Commit 54c0a4b4 authored by Linus Torvalds's avatar Linus Torvalds

Merge branch 'akpm' (incoming from Andrew)

Merge misc updates from Andrew Morton:

 - a few hotfixes

 - dynamic-debug updates

 - ipc updates

 - various other sweepings off the factory floor

* akpm: (31 commits)
  firmware/google: drop 'select EFI' to avoid recursive dependency
  compat: fix sys_fanotify_mark
  checkpatch.pl: check for function declarations without arguments
  mm/migrate.c: fix setting of cpupid on page migration twice against normal page
  softirq: use const char * const for softirq_to_name, whitespace neatening
  softirq: convert printks to pr_<level>
  softirq: use ffs() in __do_softirq()
  kernel/kexec.c: use vscnprintf() instead of vsnprintf() in vmcoreinfo_append_str()
  splice: fix unexpected size truncation
  ipc: fix compat msgrcv with negative msgtyp
  ipc,msg: document barriers
  ipc: delete seq_max field in struct ipc_ids
  ipc: simplify sysvipc_proc_open() return
  ipc: remove useless return statement
  ipc: remove braces for single statements
  ipc: standardize code comments
  ipc: whitespace cleanup
  ipc: change kern_ipc_perm.deleted type to bool
  ipc: introduce ipc_valid_object() helper to sort out IPC_RMID races
  ipc/sem.c: avoid overflow of semop undo (semadj) value
  ...
parents 1b17366d c2218e26
......@@ -731,7 +731,7 @@ static void __init request_standard_resources(const struct machine_desc *mdesc)
kernel_data.end = virt_to_phys(_end - 1);
for_each_memblock(memory, region) {
res = memblock_virt_alloc(sizeof(*res), 0);
res = memblock_virt_alloc_low(sizeof(*res), 0);
res->name = "System RAM";
res->start = __pfn_to_phys(memblock_region_memory_base_pfn(region));
res->end = __pfn_to_phys(memblock_region_memory_end_pfn(region)) - 1;
......
......@@ -35,17 +35,11 @@ static struct console early_ocd_console = {
static int __init setup_early_printk(char *buf)
{
int keep_early;
if (!buf || early_console)
return 0;
if (strstr(buf, "keep"))
keep_early = 1;
early_console = &early_ocd_console;
if (keep_early)
if (strstr(buf, "keep"))
early_console->flags &= ~CON_BOOT;
else
early_console->flags |= CON_BOOT;
......
......@@ -51,9 +51,9 @@ extern int devmem_is_allowed(unsigned long pagenr);
extern unsigned long max_low_pfn_mapped;
extern unsigned long max_pfn_mapped;
static inline phys_addr_t get_max_low_mapped(void)
static inline phys_addr_t get_max_mapped(void)
{
return (phys_addr_t)max_low_pfn_mapped << PAGE_SHIFT;
return (phys_addr_t)max_pfn_mapped << PAGE_SHIFT;
}
bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn);
......
......@@ -1119,7 +1119,7 @@ void __init setup_arch(char **cmdline_p)
setup_real_mode();
memblock_set_current_limit(get_max_low_mapped());
memblock_set_current_limit(get_max_mapped());
dma_contiguous_reserve(0);
/*
......
......@@ -12,8 +12,7 @@ menu "Google Firmware Drivers"
config GOOGLE_SMI
tristate "SMI interface for Google platforms"
depends on ACPI && DMI
select EFI
depends on ACPI && DMI && EFI
select EFI_VARS
help
Say Y here if you want to enable SMI callbacks for Google
......
......@@ -886,9 +886,9 @@ COMPAT_SYSCALL_DEFINE6(fanotify_mark,
{
return sys_fanotify_mark(fanotify_fd, flags,
#ifdef __BIG_ENDIAN
((__u64)mask1 << 32) | mask0,
#else
((__u64)mask0 << 32) | mask1,
#else
((__u64)mask1 << 32) | mask0,
#endif
dfd, pathname);
}
......
......@@ -948,7 +948,7 @@ static int ocfs2_unlink(struct inode *dir,
ocfs2_free_dir_lookup_result(&orphan_insert);
ocfs2_free_dir_lookup_result(&lookup);
if (status && (status != -ENOTEMPTY))
if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
mlog_errno(status);
return status;
......
......@@ -175,6 +175,27 @@ static inline void * __init memblock_virt_alloc_nopanic(
NUMA_NO_NODE);
}
#ifndef ARCH_LOW_ADDRESS_LIMIT
#define ARCH_LOW_ADDRESS_LIMIT 0xffffffffUL
#endif
static inline void * __init memblock_virt_alloc_low(
phys_addr_t size, phys_addr_t align)
{
return memblock_virt_alloc_try_nid(size, align,
BOOTMEM_LOW_LIMIT,
ARCH_LOW_ADDRESS_LIMIT,
NUMA_NO_NODE);
}
static inline void * __init memblock_virt_alloc_low_nopanic(
phys_addr_t size, phys_addr_t align)
{
return memblock_virt_alloc_try_nid_nopanic(size, align,
BOOTMEM_LOW_LIMIT,
ARCH_LOW_ADDRESS_LIMIT,
NUMA_NO_NODE);
}
static inline void * __init memblock_virt_alloc_from_nopanic(
phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
{
......@@ -238,6 +259,22 @@ static inline void * __init memblock_virt_alloc_nopanic(
return __alloc_bootmem_nopanic(size, align, BOOTMEM_LOW_LIMIT);
}
static inline void * __init memblock_virt_alloc_low(
phys_addr_t size, phys_addr_t align)
{
if (!align)
align = SMP_CACHE_BYTES;
return __alloc_bootmem_low(size, align, BOOTMEM_LOW_LIMIT);
}
static inline void * __init memblock_virt_alloc_low_nopanic(
phys_addr_t size, phys_addr_t align)
{
if (!align)
align = SMP_CACHE_BYTES;
return __alloc_bootmem_low_nopanic(size, align, BOOTMEM_LOW_LIMIT);
}
static inline void * __init memblock_virt_alloc_from_nopanic(
phys_addr_t size, phys_addr_t align, phys_addr_t min_addr)
{
......
......@@ -360,7 +360,7 @@ enum
/* map softirq index to softirq name. update 'softirq_to_name' in
* kernel/softirq.c when adding a new softirq.
*/
extern char *softirq_to_name[NR_SOFTIRQS];
extern const char * const softirq_to_name[NR_SOFTIRQS];
/* softirq mask and active fields moved to irq_cpustat_t in
* asm/hardirq.h to get better cache usage. KAO
......
......@@ -11,7 +11,7 @@
struct kern_ipc_perm
{
spinlock_t lock;
int deleted;
bool deleted;
int id;
key_t key;
kuid_t uid;
......
......@@ -21,7 +21,6 @@ struct user_namespace;
struct ipc_ids {
int in_use;
unsigned short seq;
unsigned short seq_max;
struct rw_semaphore rwsem;
struct idr ipcs_idr;
int next_id;
......
......@@ -9,7 +9,7 @@ struct msg_msg {
struct list_head m_list;
long m_type;
size_t m_ts; /* message text size */
struct msg_msgseg* next;
struct msg_msgseg *next;
void *security;
/* the actual message follows immediately */
};
......
......@@ -9,7 +9,7 @@
struct shmid_kernel /* private to the kernel */
{
struct kern_ipc_perm shm_perm;
struct file * shm_file;
struct file *shm_file;
unsigned long shm_nattch;
unsigned long shm_segsz;
time_t shm_atim;
......
......@@ -24,7 +24,8 @@
* Passed to the actors
*/
struct splice_desc {
unsigned int len, total_len; /* current and remaining length */
size_t total_len; /* remaining length */
unsigned int len; /* current length */
unsigned int flags; /* splice flags */
/*
* actor() private data
......
......@@ -92,8 +92,6 @@ static int kernel_init(void *);
extern void init_IRQ(void);
extern void fork_init(unsigned long);
extern void mca_init(void);
extern void sbus_init(void);
extern void radix_tree_init(void);
#ifndef CONFIG_DEBUG_RODATA
static inline void mark_rodata_ro(void) { }
......
......@@ -197,7 +197,7 @@ static inline int __put_compat_ipc_perm(struct ipc64_perm *p,
static inline int get_compat_semid64_ds(struct semid64_ds *s64,
struct compat_semid64_ds __user *up64)
{
if (!access_ok (VERIFY_READ, up64, sizeof(*up64)))
if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
return -EFAULT;
return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
}
......@@ -205,7 +205,7 @@ static inline int get_compat_semid64_ds(struct semid64_ds *s64,
static inline int get_compat_semid_ds(struct semid64_ds *s,
struct compat_semid_ds __user *up)
{
if (!access_ok (VERIFY_READ, up, sizeof(*up)))
if (!access_ok(VERIFY_READ, up, sizeof(*up)))
return -EFAULT;
return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
}
......@@ -215,7 +215,7 @@ static inline int put_compat_semid64_ds(struct semid64_ds *s64,
{
int err;
if (!access_ok (VERIFY_WRITE, up64, sizeof(*up64)))
if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
return -EFAULT;
err = __put_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
err |= __put_user(s64->sem_otime, &up64->sem_otime);
......@@ -229,7 +229,7 @@ static inline int put_compat_semid_ds(struct semid64_ds *s,
{
int err;
if (!access_ok (VERIFY_WRITE, up, sizeof(*up)))
if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
return -EFAULT;
err = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
err |= __put_user(s->sem_otime, &up->sem_otime);
......@@ -288,11 +288,11 @@ static long do_compat_semctl(int first, int second, int third, u32 pad)
break;
case IPC_SET:
if (version == IPC_64) {
if (version == IPC_64)
err = get_compat_semid64_ds(&s64, compat_ptr(pad));
} else {
else
err = get_compat_semid_ds(&s64, compat_ptr(pad));
}
up64 = compat_alloc_user_space(sizeof(s64));
if (copy_to_user(up64, &s64, sizeof(s64)))
err = -EFAULT;
......@@ -376,12 +376,12 @@ COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
struct compat_ipc_kludge ipck;
if (!uptr)
return -EINVAL;
if (copy_from_user (&ipck, uptr, sizeof(ipck)))
if (copy_from_user(&ipck, uptr, sizeof(ipck)))
return -EFAULT;
uptr = compat_ptr(ipck.msgp);
fifth = ipck.msgtyp;
}
return do_msgrcv(first, uptr, second, fifth, third,
return do_msgrcv(first, uptr, second, (s32)fifth, third,
compat_do_msg_fill);
}
case MSGGET:
......@@ -515,11 +515,11 @@ long compat_sys_msgctl(int first, int second, void __user *uptr)
break;
case IPC_SET:
if (version == IPC_64) {
if (version == IPC_64)
err = get_compat_msqid64(&m64, uptr);
} else {
else
err = get_compat_msqid(&m64, uptr);
}
if (err)
break;
p = compat_alloc_user_space(sizeof(m64));
......@@ -702,11 +702,11 @@ long compat_sys_shmctl(int first, int second, void __user *uptr)
case IPC_SET:
if (version == IPC_64) {
if (version == IPC_64)
err = get_compat_shmid64_ds(&s64, uptr);
} else {
else
err = get_compat_shmid_ds(&s64, uptr);
}
if (err)
break;
p = compat_alloc_user_space(sizeof(s64));
......
......@@ -64,7 +64,7 @@ asmlinkage long compat_sys_mq_open(const char __user *u_name,
return sys_mq_open(u_name, oflag, mode, p);
}
static int compat_prepare_timeout(struct timespec __user * *p,
static int compat_prepare_timeout(struct timespec __user **p,
const struct compat_timespec __user *u)
{
struct timespec ts;
......
......@@ -164,21 +164,21 @@ static struct ctl_table ipc_kern_table[] = {
{
.procname = "shmmax",
.data = &init_ipc_ns.shm_ctlmax,
.maxlen = sizeof (init_ipc_ns.shm_ctlmax),
.maxlen = sizeof(init_ipc_ns.shm_ctlmax),
.mode = 0644,
.proc_handler = proc_ipc_doulongvec_minmax,
},
{
.procname = "shmall",
.data = &init_ipc_ns.shm_ctlall,
.maxlen = sizeof (init_ipc_ns.shm_ctlall),
.maxlen = sizeof(init_ipc_ns.shm_ctlall),
.mode = 0644,
.proc_handler = proc_ipc_doulongvec_minmax,
},
{
.procname = "shmmni",
.data = &init_ipc_ns.shm_ctlmni,
.maxlen = sizeof (init_ipc_ns.shm_ctlmni),
.maxlen = sizeof(init_ipc_ns.shm_ctlmni),
.mode = 0644,
.proc_handler = proc_ipc_dointvec,
},
......@@ -194,7 +194,7 @@ static struct ctl_table ipc_kern_table[] = {
{
.procname = "msgmax",
.data = &init_ipc_ns.msg_ctlmax,
.maxlen = sizeof (init_ipc_ns.msg_ctlmax),
.maxlen = sizeof(init_ipc_ns.msg_ctlmax),
.mode = 0644,
.proc_handler = proc_ipc_dointvec_minmax,
.extra1 = &zero,
......@@ -203,7 +203,7 @@ static struct ctl_table ipc_kern_table[] = {
{
.procname = "msgmni",
.data = &init_ipc_ns.msg_ctlmni,
.maxlen = sizeof (init_ipc_ns.msg_ctlmni),
.maxlen = sizeof(init_ipc_ns.msg_ctlmni),
.mode = 0644,
.proc_handler = proc_ipc_callback_dointvec_minmax,
.extra1 = &zero,
......@@ -212,7 +212,7 @@ static struct ctl_table ipc_kern_table[] = {
{
.procname = "msgmnb",
.data = &init_ipc_ns.msg_ctlmnb,
.maxlen = sizeof (init_ipc_ns.msg_ctlmnb),
.maxlen = sizeof(init_ipc_ns.msg_ctlmnb),
.mode = 0644,
.proc_handler = proc_ipc_dointvec_minmax,
.extra1 = &zero,
......@@ -221,7 +221,7 @@ static struct ctl_table ipc_kern_table[] = {
{
.procname = "sem",
.data = &init_ipc_ns.sem_ctls,
.maxlen = 4*sizeof (int),
.maxlen = 4*sizeof(int),
.mode = 0644,
.proc_handler = proc_ipc_dointvec,
},
......
......@@ -73,7 +73,7 @@ struct mqueue_inode_info {
struct mq_attr attr;
struct sigevent notify;
struct pid* notify_owner;
struct pid *notify_owner;
struct user_namespace *notify_user_ns;
struct user_struct *user; /* user who created, for accounting */
struct sock *notify_sock;
......@@ -92,7 +92,7 @@ static void remove_notification(struct mqueue_inode_info *info);
static struct kmem_cache *mqueue_inode_cachep;
static struct ctl_table_header * mq_sysctl_table;
static struct ctl_table_header *mq_sysctl_table;
static inline struct mqueue_inode_info *MQUEUE_I(struct inode *inode)
{
......@@ -622,7 +622,7 @@ static struct ext_wait_queue *wq_get_first_waiter(
static inline void set_cookie(struct sk_buff *skb, char code)
{
((char*)skb->data)[NOTIFY_COOKIE_LEN-1] = code;
((char *)skb->data)[NOTIFY_COOKIE_LEN-1] = code;
}
/*
......@@ -1303,11 +1303,11 @@ SYSCALL_DEFINE2(mq_notify, mqd_t, mqdes,
out_fput:
fdput(f);
out:
if (sock) {
if (sock)
netlink_detachskb(sock, nc);
} else if (nc) {
else if (nc)
dev_kfree_skb(nc);
}
return ret;
}
......
......@@ -253,8 +253,14 @@ static void expunge_all(struct msg_queue *msq, int res)
struct msg_receiver *msr, *t;
list_for_each_entry_safe(msr, t, &msq->q_receivers, r_list) {
msr->r_msg = NULL;
msr->r_msg = NULL; /* initialize expunge ordering */
wake_up_process(msr->r_tsk);
/*
* Ensure that the wakeup is visible before setting r_msg as
* the receiving end depends on it: either spinning on a nil,
* or dealing with -EAGAIN cases. See lockless receive part 1
* and 2 in do_msgrcv().
*/
smp_mb();
msr->r_msg = ERR_PTR(res);
}
......@@ -318,7 +324,7 @@ SYSCALL_DEFINE2(msgget, key_t, key, int, msgflg)
static inline unsigned long
copy_msqid_to_user(void __user *buf, struct msqid64_ds *in, int version)
{
switch(version) {
switch (version) {
case IPC_64:
return copy_to_user(buf, in, sizeof(*in));
case IPC_OLD:
......@@ -363,7 +369,7 @@ copy_msqid_to_user(void __user *buf, struct msqid64_ds *in, int version)
static inline unsigned long
copy_msqid_from_user(struct msqid64_ds *out, void __user *buf, int version)
{
switch(version) {
switch (version) {
case IPC_64:
if (copy_from_user(out, buf, sizeof(*out)))
return -EFAULT;
......@@ -606,13 +612,13 @@ SYSCALL_DEFINE3(msgctl, int, msqid, int, cmd, struct msqid_ds __user *, buf)
static int testmsg(struct msg_msg *msg, long type, int mode)
{
switch(mode)
switch (mode)
{
case SEARCH_ANY:
case SEARCH_NUMBER:
return 1;
case SEARCH_LESSEQUAL:
if (msg->m_type <=type)
if (msg->m_type <= type)
return 1;
break;
case SEARCH_EQUAL:
......@@ -638,15 +644,22 @@ static inline int pipelined_send(struct msg_queue *msq, struct msg_msg *msg)
list_del(&msr->r_list);
if (msr->r_maxsize < msg->m_ts) {
/* initialize pipelined send ordering */
msr->r_msg = NULL;
wake_up_process(msr->r_tsk);
smp_mb();
smp_mb(); /* see barrier comment below */
msr->r_msg = ERR_PTR(-E2BIG);
} else {
msr->r_msg = NULL;
msq->q_lrpid = task_pid_vnr(msr->r_tsk);
msq->q_rtime = get_seconds();
wake_up_process(msr->r_tsk);
/*
* Ensure that the wakeup is visible before
* setting r_msg, as the receiving end depends
* on it. See lockless receive part 1 and 2 in
* do_msgrcv().
*/
smp_mb();
msr->r_msg = msg;
......@@ -654,6 +667,7 @@ static inline int pipelined_send(struct msg_queue *msq, struct msg_msg *msg)
}
}
}
return 0;
}
......@@ -696,7 +710,7 @@ long do_msgsnd(int msqid, long mtype, void __user *mtext,
goto out_unlock0;
/* raced with RMID? */
if (msq->q_perm.deleted) {
if (!ipc_valid_object(&msq->q_perm)) {
err = -EIDRM;
goto out_unlock0;
}
......@@ -716,6 +730,7 @@ long do_msgsnd(int msqid, long mtype, void __user *mtext,
goto out_unlock0;
}
/* enqueue the sender and prepare to block */
ss_add(msq, &s);
if (!ipc_rcu_getref(msq)) {
......@@ -731,7 +746,8 @@ long do_msgsnd(int msqid, long mtype, void __user *mtext,
ipc_lock_object(&msq->q_perm);
ipc_rcu_putref(msq, ipc_rcu_free);
if (msq->q_perm.deleted) {
/* raced with RMID? */
if (!ipc_valid_object(&msq->q_perm)) {
err = -EIDRM;
goto out_unlock0;
}
......@@ -909,7 +925,7 @@ long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp, int msgfl
ipc_lock_object(&msq->q_perm);
/* raced with RMID? */
if (msq->q_perm.deleted) {
if (!ipc_valid_object(&msq->q_perm)) {
msg = ERR_PTR(-EIDRM);
goto out_unlock0;
}
......@@ -983,7 +999,7 @@ long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp, int msgfl
* wake_up_process(). There is a race with exit(), see
* ipc/mqueue.c for the details.
*/
msg = (struct msg_msg*)msr_d.r_msg;
msg = (struct msg_msg *)msr_d.r_msg;
while (msg == NULL) {
cpu_relax();
msg = (struct msg_msg *)msr_d.r_msg;
......@@ -1004,7 +1020,7 @@ long do_msgrcv(int msqid, void __user *buf, size_t bufsz, long msgtyp, int msgfl
/* Lockless receive, part 4:
* Repeat test after acquiring the spinlock.
*/
msg = (struct msg_msg*)msr_d.r_msg;
msg = (struct msg_msg *)msr_d.r_msg;
if (msg != ERR_PTR(-EAGAIN))
goto out_unlock0;
......
This diff is collapsed.
......@@ -67,7 +67,7 @@ static const struct vm_operations_struct shm_vm_ops;
static int newseg(struct ipc_namespace *, struct ipc_params *);
static void shm_open(struct vm_area_struct *vma);
static void shm_close(struct vm_area_struct *vma);
static void shm_destroy (struct ipc_namespace *ns, struct shmid_kernel *shp);
static void shm_destroy(struct ipc_namespace *ns, struct shmid_kernel *shp);
#ifdef CONFIG_PROC_FS
static int sysvipc_shm_proc_show(struct seq_file *s, void *it);
#endif
......@@ -91,7 +91,7 @@ static void do_shm_rmid(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp)
struct shmid_kernel *shp;
shp = container_of(ipcp, struct shmid_kernel, shm_perm);
if (shp->shm_nattch){
if (shp->shm_nattch) {
shp->shm_perm.mode |= SHM_DEST;
/* Do not find it any more */
shp->shm_perm.key = IPC_PRIVATE;
......@@ -116,7 +116,7 @@ static int __init ipc_ns_init(void)
pure_initcall(ipc_ns_init);
void __init shm_init (void)
void __init shm_init(void)
{
ipc_init_proc_interface("sysvipc/shm",
#if BITS_PER_LONG <= 32
......@@ -248,7 +248,7 @@ static bool shm_may_destroy(struct ipc_namespace *ns, struct shmid_kernel *shp)
*/
static void shm_close(struct vm_area_struct *vma)
{
struct file * file = vma->vm_file;
struct file *file = vma->vm_file;
struct shm_file_data *sfd = shm_file_data(file);
struct shmid_kernel *shp;
struct ipc_namespace *ns = sfd->ns;
......@@ -379,7 +379,7 @@ static struct mempolicy *shm_get_policy(struct vm_area_struct *vma,
}
#endif
static int shm_mmap(struct file * file, struct vm_area_struct * vma)
static int shm_mmap(struct file *file, struct vm_area_struct *vma)
{
struct shm_file_data *sfd = shm_file_data(file);
int ret;
......@@ -477,7 +477,6 @@ static const struct vm_operations_struct shm_vm_ops = {
*
* Called with shm_ids.rwsem held as a writer.
*/
static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
{
key_t key = params->key;
......@@ -486,7 +485,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
int error;
struct shmid_kernel *shp;
size_t numpages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
struct file * file;
struct file *file;
char name[13];
int id;
vm_flags_t acctflag = 0;
......@@ -512,7 +511,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
return error;
}
sprintf (name, "SYSV%08x", key);
sprintf(name, "SYSV%08x", key);
if (shmflg & SHM_HUGETLB) {
struct hstate *hs;
size_t hugesize;
......@@ -628,7 +627,7 @@ SYSCALL_DEFINE3(shmget, key_t, key, size_t, size, int, shmflg)
static inline unsigned long copy_shmid_to_user(void __user *buf, struct shmid64_ds *in, int version)
{
switch(version) {
switch (version) {
case IPC_64:
return copy_to_user(buf, in, sizeof(*in));
case IPC_OLD:
......@@ -655,7 +654,7 @@ static inline unsigned long copy_shmid_to_user(void __user *buf, struct shmid64_
static inline unsigned long
copy_shmid_from_user(struct shmid64_ds *out, void __user *buf, int version)
{
switch(version) {
switch (version) {
case IPC_64:
if (copy_from_user(out, buf, sizeof(*out)))
return -EFAULT;
......@@ -680,14 +679,14 @@ copy_shmid_from_user(struct shmid64_ds *out, void __user *buf, int version)
static inline unsigned long copy_shminfo_to_user(void __user *buf, struct shminfo64 *in, int version)
{
switch(version) {
switch (version) {
case IPC_64:
return copy_to_user(buf, in, sizeof(*in));
case IPC_OLD:
{
struct shminfo out;
if(in->shmmax > INT_MAX)
if (in->shmmax > INT_MAX)
out.shmmax = INT_MAX;
else
out.shmmax = (int)in->shmmax;
......@@ -846,14 +845,14 @@ static int shmctl_nolock(struct ipc_namespace *ns, int shmid,
shminfo.shmall = ns->shm_ctlall;
shminfo.shmmin = SHMMIN;
if(copy_shminfo_to_user (buf, &shminfo, version))
if (copy_shminfo_to_user(buf, &shminfo, version))
return -EFAULT;
down_read(&shm_ids(ns).rwsem);
err = ipc_get_maxid(&shm_ids(ns));
up_read(&shm_ids(ns).rwsem);
if(err<0)
if (err < 0)
err = 0;
goto out;
}
......@@ -864,7 +863,7 @@ static int shmctl_nolock(struct ipc_namespace *ns, int shmid,
memset(&shm_info, 0, sizeof(shm_info));
down_read(&shm_ids(ns).rwsem);
shm_info.used_ids = shm_ids(ns).in_use;
shm_get_stat (ns, &shm_info.shm_rss, &shm_info.shm_swp);
shm_get_stat(ns, &shm_info.shm_rss, &shm_info.shm_swp);
shm_info.shm_tot = ns->shm_tot;
shm_info.swap_attempts = 0;
shm_info.swap_successes = 0;
......@@ -975,6 +974,13 @@ SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf)
goto out_unlock1;
ipc_lock_object(&shp->shm_perm);
/* check if shm_destroy() is tearing down shp */
if (!ipc_valid_object(&shp->shm_perm)) {
err = -EIDRM;
goto out_unlock0;
}
if (!ns_capable(ns->user_ns, CAP_IPC_LOCK)) {
kuid_t euid = current_euid();
if (!uid_eq(euid, shp->shm_perm.uid) &&
......@@ -989,13 +995,6 @@ SYSCALL_DEFINE3(shmctl, int, shmid, int, cmd, struct shmid_ds __user *, buf)
}
shm_file = shp->shm_file;
/* check if shm_destroy() is tearing down shp */
if (shm_file == NULL) {
err = -EIDRM;
goto out_unlock0;
}
if (is_file_hugepages(shm_file))
goto out_unlock0;
......@@ -1047,7 +1046,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr,
struct shmid_kernel *shp;
unsigned long addr;
unsigned long size;
struct file * file;
struct file *file;
int err;
unsigned long flags;
unsigned long prot;
......@@ -1116,7 +1115,7 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr,
ipc_lock_object(&shp->shm_perm);
/* check if shm_destroy() is tearing down shp */
if (shp->shm_file == NULL) {
if (!ipc_valid_object(&shp->shm_perm)) {
ipc_unlock_object(&shp->shm_perm);
err = -EIDRM;
goto out_unlock;
......
This diff is collapsed.
......@@ -15,9 +15,9 @@
#define SEQ_MULTIPLIER (IPCMNI)
void sem_init (void);
void msg_init (void);
void shm_init (void);
void sem_init(void);
void msg_init(void);
void shm_init(void);
struct ipc_namespace;
......@@ -100,6 +100,7 @@ void __init ipc_init_proc_interface(const char *path, const char *header,
#define ipcid_to_idx(id) ((id) % SEQ_MULTIPLIER)
#define ipcid_to_seqx(id) ((id) / SEQ_MULTIPLIER)
#define IPCID_SEQ_MAX min_t(int, INT_MAX/SEQ_MULTIPLIER, USHRT_MAX)
/* must be called with ids->rwsem acquired for writing */
int ipc_addid(struct ipc_ids *, struct kern_ipc_perm *, int);
......@@ -116,8 +117,8 @@ int ipcperms(struct ipc_namespace *ns, struct kern_ipc_perm *ipcp, short flg);
/* for rare, potentially huge allocations.
* both function can sleep
*/
void* ipc_alloc(int size);
void ipc_free(void* ptr, int size);
void *ipc_alloc(int size);
void ipc_free(void *ptr, int size);
/*
* For allocation that need to be freed by RCU.
......@@ -125,7 +126,7 @@ void ipc_free(void* ptr, int size);
* getref increases the refcount, the putref call that reduces the recount
* to 0 schedules the rcu destruction. Caller must guarantee locking.
*/
void* ipc_rcu_alloc(int size);
void *ipc_rcu_alloc(int size);
int ipc_rcu_getref(void *ptr);
void ipc_rcu_putref(void *ptr, void (*func)(struct rcu_head *head));
void ipc_rcu_free(struct rcu_head *head);
......@@ -144,7 +145,7 @@ struct kern_ipc_perm *ipcctl_pre_down_nolock(struct ipc_namespace *ns,
/* On IA-64, we always use the "64-bit version" of the IPC structures. */
# define ipc_parse_version(cmd) IPC_64
#else
int ipc_parse_version (int *cmd);
int ipc_parse_version(int *cmd);
#endif
extern void free_msg(struct msg_msg *msg);
......@@ -185,6 +186,19 @@ static inline void ipc_unlock(struct kern_ipc_perm *perm)
rcu_read_unlock();
}
/*
* ipc_valid_object() - helper to sort out IPC_RMID races for codepaths
* where the respective ipc_ids.rwsem is not being held down.
* Checks whether the ipc object is still around or if it's gone already, as
* ipc_rmid() may have already freed the ID while the ipc lock was spinning.
* Needs to be called with kern_ipc_perm.lock held -- exception made for one
* checkpoint case at sys_semtimedop() as noted in code commentary.
*/
static inline bool ipc_valid_object(struct kern_ipc_perm *perm)
{
return !perm->deleted;
}
struct kern_ipc_perm *ipc_obtain_object_check(struct ipc_ids *ids, int id);
int ipcget(struct ipc_namespace *ns, struct ipc_ids *ids,
struct ipc_ops *ops, struct ipc_params *params);
......
......@@ -1537,7 +1537,7 @@ void vmcoreinfo_append_str(const char *fmt, ...)
size_t r;
va_start(args, fmt);
r = vsnprintf(buf, sizeof(buf), fmt, args);
r = vscnprintf(buf, sizeof(buf), fmt, args);
va_end(args);
r = min(r, vmcoreinfo_max_size - vmcoreinfo_size);
......
......@@ -8,6 +8,8 @@
* Rewritten. Old one was good in 2.2, but in 2.3 it was immoral. --ANK (990903)
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/export.h>
#include <linux/kernel_stat.h>
#include <linux/interrupt.h>
......@@ -54,7 +56,7 @@ static struct softirq_action softirq_vec[NR_SOFTIRQS] __cacheline_aligned_in_smp
DEFINE_PER_CPU(struct task_struct *, ksoftirqd);
char *softirq_to_name[NR_SOFTIRQS] = {
const char * const softirq_to_name[NR_SOFTIRQS] = {
"HI", "TIMER", "NET_TX", "NET_RX", "BLOCK", "BLOCK_IOPOLL",
"TASKLET", "SCHED", "HRTIMER", "RCU"
};
......@@ -136,7 +138,6 @@ void _local_bh_enable(void)
WARN_ON_ONCE(in_irq());
__local_bh_enable(SOFTIRQ_DISABLE_OFFSET);
}
EXPORT_SYMBOL(_local_bh_enable);
void __local_bh_enable_ip(unsigned long ip, unsigned int cnt)
......@@ -229,6 +230,7 @@ asmlinkage void __do_softirq(void)
struct softirq_action *h;
bool in_hardirq;
__u32 pending;
int softirq_bit;
int cpu;
/*
......@@ -253,10 +255,14 @@ asmlinkage void __do_softirq(void)
h = softirq_vec;
do {
if (pending & 1) {
unsigned int vec_nr = h - softirq_vec;
int prev_count = preempt_count();
while ((softirq_bit = ffs(pending))) {
unsigned int vec_nr;
int prev_count;
h += softirq_bit - 1;
vec_nr = h - softirq_vec;
prev_count = preempt_count();
kstat_incr_softirqs_this_cpu(vec_nr);
......@@ -264,19 +270,15 @@ asmlinkage void __do_softirq(void)
h->action(h);
trace_softirq_exit(vec_nr);
if (unlikely(prev_count != preempt_count())) {
printk(KERN_ERR "huh, entered softirq %u %s %p"
"with preempt_count %08x,"
" exited with %08x?\n", vec_nr,
softirq_to_name[vec_nr], h->action,
pr_err("huh, entered softirq %u %s %p with preempt_count %08x, exited with %08x?\n",
vec_nr, softirq_to_name[vec_nr], h->action,
prev_count, preempt_count());
preempt_count_set(prev_count);
}
rcu_bh_qs(cpu);
}
h++;
pending >>= 1;
} while (pending);
pending >>= softirq_bit;
}
local_irq_disable();
......@@ -433,8 +435,7 @@ void open_softirq(int nr, void (*action)(struct softirq_action *))
/*
* Tasklets
*/
struct tasklet_head
{
struct tasklet_head {
struct tasklet_struct *head;
struct tasklet_struct **tail;
};
......@@ -453,7 +454,6 @@ void __tasklet_schedule(struct tasklet_struct *t)
raise_softirq_irqoff(TASKLET_SOFTIRQ);
local_irq_restore(flags);
}
EXPORT_SYMBOL(__tasklet_schedule);
void __tasklet_hi_schedule(struct tasklet_struct *t)
......@@ -467,7 +467,6 @@ void __tasklet_hi_schedule(struct tasklet_struct *t)
raise_softirq_irqoff(HI_SOFTIRQ);
local_irq_restore(flags);
}
EXPORT_SYMBOL(__tasklet_hi_schedule);
void __tasklet_hi_schedule_first(struct tasklet_struct *t)
......@@ -478,7 +477,6 @@ void __tasklet_hi_schedule_first(struct tasklet_struct *t)
__this_cpu_write(tasklet_hi_vec.head, t);
__raise_softirq_irqoff(HI_SOFTIRQ);
}
EXPORT_SYMBOL(__tasklet_hi_schedule_first);
static void tasklet_action(struct softirq_action *a)
......@@ -498,7 +496,8 @@ static void tasklet_action(struct softirq_action *a)
if (tasklet_trylock(t)) {
if (!atomic_read(&t->count)) {
if (!test_and_clear_bit(TASKLET_STATE_SCHED, &t->state))
if (!test_and_clear_bit(TASKLET_STATE_SCHED,
&t->state))
BUG();
t->func(t->data);
tasklet_unlock(t);
......@@ -533,7 +532,8 @@ static void tasklet_hi_action(struct softirq_action *a)
if (tasklet_trylock(t)) {
if (!atomic_read(&t->count)) {
if (!test_and_clear_bit(TASKLET_STATE_SCHED, &t->state))
if (!test_and_clear_bit(TASKLET_STATE_SCHED,
&t->state))
BUG();
t->func(t->data);
tasklet_unlock(t);
......@@ -551,7 +551,6 @@ static void tasklet_hi_action(struct softirq_action *a)
}
}
void tasklet_init(struct tasklet_struct *t,
void (*func)(unsigned long), unsigned long data)
{
......@@ -561,13 +560,12 @@ void tasklet_init(struct tasklet_struct *t,
t->func = func;
t->data = data;
}
EXPORT_SYMBOL(tasklet_init);
void tasklet_kill(struct tasklet_struct *t)
{
if (in_interrupt())
printk("Attempt to kill tasklet from interrupt\n");
pr_notice("Attempt to kill tasklet from interrupt\n");
while (test_and_set_bit(TASKLET_STATE_SCHED, &t->state)) {
do {
......@@ -577,7 +575,6 @@ void tasklet_kill(struct tasklet_struct *t)
tasklet_unlock_wait(t);
clear_bit(TASKLET_STATE_SCHED, &t->state);
}
EXPORT_SYMBOL(tasklet_kill);
/*
......@@ -727,8 +724,7 @@ static void takeover_tasklets(unsigned int cpu)
}
#endif /* CONFIG_HOTPLUG_CPU */
static int cpu_callback(struct notifier_block *nfb,
unsigned long action,
static int cpu_callback(struct notifier_block *nfb, unsigned long action,
void *hcpu)
{
switch (action) {
......
......@@ -268,14 +268,12 @@ static int ddebug_tokenize(char *buf, char *words[], int maxwords)
*/
static inline int parse_lineno(const char *str, unsigned int *val)
{
char *end = NULL;
BUG_ON(str == NULL);
if (*str == '\0') {
*val = 0;
return 0;
}
*val = simple_strtoul(str, &end, 10);
if (end == NULL || end == str || *end != '\0') {
if (kstrtouint(str, 10, val) < 0) {
pr_err("bad line-number: %s\n", str);
return -EINVAL;
}
......@@ -348,14 +346,14 @@ static int ddebug_parse_query(char *words[], int nwords,
}
if (last)
*last++ = '\0';
if (parse_lineno(first, &query->first_lineno) < 0) {
pr_err("line-number is <0\n");
if (parse_lineno(first, &query->first_lineno) < 0)
return -EINVAL;
}
if (last) {
/* range <first>-<last> */
if (parse_lineno(last, &query->last_lineno)
< query->first_lineno) {
if (parse_lineno(last, &query->last_lineno) < 0)
return -EINVAL;
if (query->last_lineno < query->first_lineno) {
pr_err("last-line:%d < 1st-line:%d\n",
query->last_lineno,
query->first_lineno);
......
......@@ -172,7 +172,7 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
/*
* Get the overflow emergency buffer
*/
v_overflow_buffer = memblock_virt_alloc_nopanic(
v_overflow_buffer = memblock_virt_alloc_low_nopanic(
PAGE_ALIGN(io_tlb_overflow),
PAGE_SIZE);
if (!v_overflow_buffer)
......@@ -220,7 +220,7 @@ swiotlb_init(int verbose)
bytes = io_tlb_nslabs << IO_TLB_SHIFT;
/* Get IO TLB memory from the low pages */
vstart = memblock_virt_alloc_nopanic(PAGE_ALIGN(bytes), PAGE_SIZE);
vstart = memblock_virt_alloc_low_nopanic(PAGE_ALIGN(bytes), PAGE_SIZE);
if (vstart && !swiotlb_init_with_tbl(vstart, io_tlb_nslabs, verbose))
return;
......
......@@ -984,9 +984,6 @@ static phys_addr_t __init memblock_alloc_base_nid(phys_addr_t size,
if (!align)
align = SMP_CACHE_BYTES;
/* align @size to avoid excessive fragmentation on reserved array */
size = round_up(size, align);
found = memblock_find_in_range_node(size, align, 0, max_addr, nid);
if (found && !memblock_reserve(found, size))
return found;
......@@ -1080,9 +1077,6 @@ static void * __init memblock_virt_alloc_internal(
if (!align)
align = SMP_CACHE_BYTES;
/* align @size to avoid excessive fragmentation on reserved array */
size = round_up(size, align);
again:
alloc = memblock_find_in_range_node(size, align, min_addr, max_addr,
nid);
......
......@@ -1548,8 +1548,6 @@ static struct page *alloc_misplaced_dst_page(struct page *page,
__GFP_NOMEMALLOC | __GFP_NORETRY |
__GFP_NOWARN) &
~GFP_IOFS, 0);
if (newpage)
page_cpupid_xchg_last(newpage, page_cpupid_last(page));
return newpage;
}
......
......@@ -202,4 +202,4 @@ static int __init mm_sysfs_init(void)
return 0;
}
pure_initcall(mm_sysfs_init);
postcore_initcall(mm_sysfs_init);
......@@ -220,12 +220,12 @@ int is_vmalloc_or_module_addr(const void *x)
}
/*
* Walk a vmap address to the physical pfn it maps to.
* Walk a vmap address to the struct page it maps.
*/
unsigned long vmalloc_to_pfn(const void *vmalloc_addr)
struct page *vmalloc_to_page(const void *vmalloc_addr)
{
unsigned long addr = (unsigned long) vmalloc_addr;
unsigned long pfn = 0;
struct page *page = NULL;
pgd_t *pgd = pgd_offset_k(addr);
/*
......@@ -244,23 +244,23 @@ unsigned long vmalloc_to_pfn(const void *vmalloc_addr)
ptep = pte_offset_map(pmd, addr);
pte = *ptep;
if (pte_present(pte))
pfn = pte_pfn(pte);
page = pte_page(pte);
pte_unmap(ptep);
}
}
}
return pfn;
return page;
}
EXPORT_SYMBOL(vmalloc_to_pfn);
EXPORT_SYMBOL(vmalloc_to_page);
/*
* Map a vmalloc()-space virtual address to the struct page.
* Map a vmalloc()-space virtual address to the physical page frame number.
*/
struct page *vmalloc_to_page(const void *vmalloc_addr)
unsigned long vmalloc_to_pfn(const void *vmalloc_addr)
{
return pfn_to_page(vmalloc_to_pfn(vmalloc_addr));
return page_to_pfn(vmalloc_to_page(vmalloc_addr));
}
EXPORT_SYMBOL(vmalloc_to_page);
EXPORT_SYMBOL(vmalloc_to_pfn);
/*** Global kva allocator ***/
......
......@@ -2665,6 +2665,15 @@ sub process {
$herecurr);
}
# check for function declarations without arguments like "int foo()"
if ($line =~ /(\b$Type\s+$Ident)\s*\(\s*\)/) {
if (ERROR("FUNCTION_WITHOUT_ARGS",
"Bad function definition - $1() should probably be $1(void)\n" . $herecurr) &&
$fix) {
$fixed[$linenr - 1] =~ s/(\b($Type)\s+($Ident))\s*\(\s*\)/$2 $3(void)/;
}
}
# check for uses of DEFINE_PCI_DEVICE_TABLE
if ($line =~ /\bDEFINE_PCI_DEVICE_TABLE\s*\(\s*(\w+)\s*\)\s*=/) {
if (WARN("DEFINE_PCI_DEVICE_TABLE",
......
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