- 08 Jan, 2009 40 commits
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Gowrishankar M authored
Once tasks are populated from system namespace inside cgroup, container replaces other namespace task with 0 while listing tasks, inside container. Though this is expected behaviour from container end, there is no use of showing unwanted 0s. In this patch, we check if a process is in same namespace before loading into pid array. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by:
Gowrishankar M <gowrishankar.m@in.ibm.com> Acked-by:
Paul Menage <menage@google.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Li Zefan authored
Add a common function link_css_set() to link a css_set to a cgroup. Signed-off-by:
Li Zefan <lizf@cn.fujitsu.com> Cc: Paul Menage <menage@google.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Balbir Singh <balbir@in.ibm.com> Signed-off-by:
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Li Zefan authored
Though for an inactive hierarchy, we have subsys->root == &rootnode, but rootnode's subsys_list is always empty. This conflicts with the code in find_css_set(): for (i = 0; i < CGROUP_SUBSYS_COUNT; i++) { ... if (ss->root->subsys_list.next == &ss->sibling) { ... } } if (list_empty(&rootnode.subsys_list)) { ... } The above code assumes rootnode.subsys_list links all inactive hierarchies. Signed-off-by: -
Li Zefan authored
Don't link rootnode to the root list, so root_list contains active hierarchies only as the comment indicates. And rename for_each_root() to for_each_active_root(). Also remove redundant check in cgroup_kill_sb(). Signed-off-by:
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Lai Jiangshan authored
cgroup_iter_* do not need rcu_read_lock(). In cgroup_enable_task_cg_lists(), do_each_thread() and while_each_thread() are protected by RCU, it's OK, for write_lock(&css_set_lock) implies rcu_read_lock() in non-RT kernel. If we need explicit rcu_read_lock(), we should add rcu_read_lock() in cgroup_enable_task_cg_lists(), not cgroup_iter_*. Signed-off-by:
Lai Jiangshan <laijs@cn.fujitsu.com> Acked-by:
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Lai Jiangshan authored
In cgroup_attach_task(), tsk maybe exit when we call find_css_set(). and find_css_set() will access to invalid css_set. This patch increases the count before get_css_set(), and decreases it after find_css_set(). NOTE: css_set's refcount is also taskcount, after this patch applied, taskcount may be off-by-one WHEN cgroup_lock() is not held. but I reviewed other code which use taskcount, they are still correct. No regression found by reviewing and simply testing. So I do not use two counters in css_set. (one counter for taskcount, the other for refcount. like struct mm_struct) If this fix cause regression, we will use two counters in css_set. Signed-off-by:
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Lai Jiangshan authored
Use task_lock() protect tsk->cgroups and get_css_set(tsk->cgroups). Signed-off-by:
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Lai Jiangshan authored
We don't access struct cgroupfs_root in fast path, so we should not put struct cgroupfs_root protected by RCU But the comment in struct cgroup_subsys.root confuse us. struct cgroup_subsys.root is used in these places: 1 find_css_set(): if (ss->root->subsys_list.next == &ss->sibling) 2 rebind_subsystems(): if (ss->root != &rootnode) rcu_assign_pointer(ss->root, root); rcu_assign_pointer(subsys[i]->root, &rootnode); 3 cgroup_has_css_refs(): if (ss->root != cgrp->root) 4 cgroup_init_subsys(): ss->root = &rootnode; 5 proc_cgroupstats_show(): ss->name, ss->root->subsys_bits, ss->root->number_of_cgroups, !ss->disabled); 6 cgroup_clone(): root = subsys->root; if ((root != subsys->root) || All these place we have held cgroup_lock() or we don't dereference to struct cgroupfs_root. It's means wo don't need RCU when use struct cgroup_subsys.root, and we should not put struct cgroupfs_root protected by RCU. Signed-off-by: -
Lai Jiangshan authored
We access res->cgroups without the task_lock(), so res->cgroups may be changed. it's unreliable, and "if (l == &res->cgroups->tasks)" may be false forever. We don't need add any lock for fixing this bug. we just access to struct css_set by struct cg_cgroup_link, not by struct task_struct. Since we hold css_set_lock, struct cg_cgroup_link is reliable. Signed-off-by:
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Lai Jiangshan authored
When cgroup_post_fork() is called, child is seen by find_task_by_vpid(), so child->cgroups maybe be changed, It'll incorrect. child->cgroups<old>'s refcnt is decreased child->cgroups<new>'s refcnt is increased but child->cg_list is added to child->cgroups<old>'s list. Signed-off-by:
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Li Zefan authored
s/contoller/controller/ Signed-of-by:
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Pavel Emelyanov <xemul@openvz.org> Signed-off-by:
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Li Zefan authored
I happened to find the spinlock in struct ns_cgroup is never used. Signed-off-by:
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Li Zefan authored
- In cgroup_clone(), if vfs_mkdir() returns successfully, dentry->d_fsdata will be the pointer to the newly created cgroup and won't be NULL. - a cgroup file's dentry->d_fsdata won't be NULL, guaranteed by cgroup_add_file(). - When walking through the subsystems of a cgroup_fs (using for_each_subsys), cgrp->subsys[ss->subsys_id] won't be NULL, guaranteed by cgroup_create(). (Also remove 2 unused variables in cgroup_rmdir(). Signed-off-by:
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Li Zefan authored
- remove 'releasable' since it has been moved to the debug subsys. - update lock requirements of subsys callbacks. Signed-off-by:
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KAMEZAWA Hiroyuki authored
Making CGROUP related configs be a sub-menu. This patch make CGROUP related configs be a sub-menu and makes 1st level configs of "General Setup" shorter. including following additional changes - add help comment about CGROUPS and GROUP_SCHED. - moved MM_OWNER config to the bottom. (for good indent in menuconfig) Signed-off-by:Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp> Cc: Balbir Singh <balbir@in.ibm.com> Cc: Paul Menage <menage@google.com> Signed-off-by:
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Jan Kara authored
do_set_dqblk() allowed SETDQBLK quotactl to set user's grace time even if user was not above his softlimit. This does not make much sence and by coincidence causes quota code to omit softlimit warning when user really exceeds softlimit. This patch makes do_set_dqblk() reset user's grace time if he has not exceeded softlimit. Signed-off-by:
Jan Kara <jack@suse.cz> Signed-off-by:
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Richard A. Holden III authored
Fix fs/coda/sysctl.c:14: warning: 'fs_table_header' defined but not used fs/coda/sysctl.c:44: warning: 'fs_table' defined but not used these are only used when CONFIG_SYSCTL is defined. Signed-off-by:
Richard A. Holden III <aciddeath@gmail.com> Cc: Jan Harkes <jaharkes@cs.cmu.edu> Signed-off-by:
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Randy Dunlap authored
Remove excess kernel-doc from fs/jbd/transaction.c: Warning(linux-2.6.28-git5//fs/jbd/transaction.c:764): Excess function parameter 'credits' description in 'journal_get_write_access' Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
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Duane Griffin authored
At the moment there are few restrictions on which flags may be set on which inodes. Specifically DIRSYNC may only be set on directories and IMMUTABLE and APPEND may not be set on links. Tighten that to disallow TOPDIR being set on non-directories and only NODUMP and NOATIME to be set on non-regular file, non-directories. Introduces a flags masking function which masks flags based on mode and use it during inode creation and when flags are set via the ioctl to facilitate future consistency. Signed-off-by:
Duane Griffin <duaneg@dghda.com> Acked-by:
Andreas Dilger <adilger@sun.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by:
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Duane Griffin authored
At present INDEX is the only flag that new ext3 inodes do NOT inherit from their parent. In addition prevent the flags DIRTY, ECOMPR, IMAGIC and TOPDIR from being inherited. List inheritable flags explicitly to prevent future flags from accidentally being inherited. This fixes the TOPDIR flag inheritance bug reported at http://bugzilla.kernel.org/show_bug.cgi?id=9866. Signed-off-by:
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Pekka Enberg authored
As spotted by kmemtrace, struct ext3_sb_info is 17152 bytes on 64-bit which makes it a very bad fit for SLAB allocators. The culprit of the wasted memory is ->s_blockgroup_lock which can be as big as 16 KB when NR_CPUS >= 32. To fix that, allocate ->s_blockgroup_lock, which fits nicely in a order 2 page in the worst case, separately. This shinks down struct ext3_sb_info enough to fit a 1 KB slab cache so now we allocate 16 KB + 1 KB instead of 32 KB saving 15 KB of memory. Acked-by:
Pekka Enberg <penberg@cs.helsinki.fi> Cc: <linux-ext4@vger.kernel.org> Signed-off-by:
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Josef Bacik authored
There is a flaw with the way jbd handles fsync batching. If we fsync() a file and we were not the last person to run fsync() on this fs then we automatically sleep for 1 jiffie in order to wait for new writers to join into the transaction before forcing the commit. The problem with this is that with really fast storage (ie a Clariion) the time it takes to commit a transaction to disk is way faster than 1 jiffie in most cases, so sleeping means waiting longer with nothing to do than if we just committed the transaction and kept going. Ric Wheeler noticed this when using fs_mark with more than 1 thread, the throughput would plummet as he added more threads. This patch attempts to fix this problem by recording the average time in nanoseconds that it takes to commit a transaction to disk, and what time we started the transaction. If we run an fsync() and we have been running for less time than it takes to commit the transaction to disk, we sleep for the delta amount of time and then commit to disk. We acheive sub-jiffie sleeping using schedule_hrtimeout. This means that the wait time is auto-tuned to the speed of the underlying disk, instead of having this static timeout. I weighted the average according to somebody's comments (Andreas Dilger I think) in order to help normalize random outliers where we take way longer or way less time to commit than the average. I also have a min() check in there to make sure we don't sleep longer than a jiffie in case our storage is super slow, this was requested by Andrew. I unfortunately do not have access to a Clariion, so I had to use a ramdisk to represent a super fast array. I tested with a SATA drive with barrier=1 to make sure there was no regression with local disks, I tested with a 4 way multipathed Apple Xserve RAID array and of course the ramdisk. I ran the following command fs_mark -d /mnt/ext3-test -s 4096 -n 2000 -D 64 -t $i where $i was 2, 4, 8, 16 and 32. I mkfs'ed the fs each time. Here are my results type threads with patch without patch sata 2 24.6 26.3 sata 4 49.2 48.1 sata 8 70.1 67.0 sata 16 104.0 94.1 sata 32 153.6 142.7 xserve 2 246.4 222.0 xserve 4 480.0 440.8 xserve 8 829.5 730.8 xserve 16 1172.7 1026.9 xserve 32 1816.3 1650.5 ramdisk 2 2538.3 1745.6 ramdisk 4 2942.3 661.9 ramdisk 8 2882.5 999.8 ramdisk 16 2738.7 1801.9 ramdisk 32 2541.9 2394.0 Signed-off-by:
Josef Bacik <jbacik@redhat.com> Cc: Andreas Dilger <adilger@sun.com> Cc: Arjan van de Ven <arjan@infradead.org> Cc: Ric Wheeler <rwheeler@redhat.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by:
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Duane Griffin authored
At the moment there are few restrictions on which flags may be set on which inodes. Specifically DIRSYNC may only be set on directories and IMMUTABLE and APPEND may not be set on links. Tighten that to disallow TOPDIR being set on non-directories and only NODUMP and NOATIME to be set on non-regular file, non-directories. Introduces a flags masking function which masks flags based on mode and use it during inode creation and when flags are set via the ioctl to facilitate future consistency. Signed-off-by:
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Duane Griffin authored
At present BTREE/INDEX is the only flag that new ext2 inodes do NOT inherit from their parent. In addition prevent the flags DIRTY, ECOMPR, INDEX, IMAGIC and TOPDIR from being inherited. List inheritable flags explicitly to prevent future flags from accidentally being inherited. This fixes the TOPDIR flag inheritance bug reported at http://bugzilla.kernel.org/show_bug.cgi?id=9866. Signed-off-by:
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Pekka J Enberg authored
As spotted by kmemtrace, struct ext2_sb_info is 17024 bytes on 64-bit which makes it a very bad fit for SLAB allocators. The culprit of the wasted memory is ->s_blockgroup_lock which can be as big as 16 KB when NR_CPUS >= 32. To fix that, allocate ->s_blockgroup_lock, which fits nicely in a order 2 page in the worst case, separately. This shinks down struct ext2_sb_info enough to fit a 1 KB slab cache so now we allocate 16 KB + 1 KB instead of 32 KB saving 15 KB of memory. Acked-by:
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Qinghuang Feng authored
There is no argument named @chain in ext2_splice_branch, remove references to it. Signed-off-by:
Qinghuang Feng <qhfeng.kernel@gmail.com> Signed-off-by:
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Jüri Reitel authored
Remove RTC register value checks from the rtc-ds1307 probe() function. They were left over from the legacy style I2C driver, which had to defend against finding a non-RTC chip when the driver was probed. Also fix a minor glitch in the alarm support: DS1307 chips don't have alarms, so name those methods after one of the chips which actually *do* have alarms (DS1337). Signed-off-by:
Jüri Reitel <juri.reitel@liewenthal.ee> Signed-off-by:
David Brownell <dbrownell@users.sourceforge.net> Cc: Sebastien Barre <sbarre@sdelcc.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Acked-by:
Jean Delvare <khali@linux-fr.org> Cc: Rodolfo Giometti <giometti@enneenne.com> Signed-off-by:
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BARRE Sebastien authored
Change i2c access functions to SMBus access functions in order to use the ds1307 with SMBus adapter. Signed-off-by:
Sebastien Barre <sbarre@sdelcc.com> Acked-by:
David Brownell <david-b@pacbell.net> Tested-by:
Alessandro Zummo <a.zummo@towertech.it> Acked-by:
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Alex Zeffertt authored
The xenfs filesystem exports various interfaces to usermode. Initially this exports a file to allow usermode to interact with xenbus/xenstore. Traditionally this appeared in /proc/xen. Rather than extending procfs, this patch adds a backward-compat mountpoint on /proc/xen, and provides a xenfs filesystem which can be mounted there. Signed-off-by:
Alex Zeffertt <alex.zeffertt@eu.citrix.com> Signed-off-by:
Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Qinghuang Feng authored
no argument named @xbt in xenbus_switch_state(), remove it. Signed-off-by:
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Dave Kleikamp authored
sync_filesystems() shouldn't be calling async_synchronize_full_special while holding a spinlock. The second while loop in that function is the right place for this anyway. Signed-off-by:
Dave Kleikamp <shaggy@linux.vnet.ibm.com> Cc: Arjan van de Ven <arjan@linux.intel.com> Reported-by:
Grissiom <chaos.proton@gmail.com> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: sparc64: Work around branch tracer warning. sparc64: Fix unsigned long long warnings in drivers. sparc64: Use unsigned long long for u64. sparc: refactor code in fault_32.c sparc64: refactor code in init_64.c sparc64: refactor code in viohs.c sparc: make proces_ver_nack a bit more readable
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git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6Linus Torvalds authored
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: V4L/DVB (10191a): Update MAINTAINERS entries on media drivers V4L/DVB (10190): cx88: Fix some Kbuild troubles V4L/DVB (10189): dm1105: Fix build with INPUT=m and DVB_DM1105=y V4L/DVB (10185): Use negated usb_endpoint_xfer_control, etc V4L/DVB (10182): tda8290: fix TDA8290 + TDA18271 initialization V4L/DVB (10181): v4l2-device: Fix some sparse warnings V4L/DVB (10180): drivers/media: Fix a number of sparse warnings V4L/DVB (10179): tda8290: Fix two sparse warnings V4L/DVB (10178): dvb_frontend: Fix some sparse warnings due to static symbols V4L/DVB (10177): Fix sparse warnings on em28xx V4L/DVB (10176b): pxa-camera: fix redefinition warnings and missing DMA definitions V4L/DVB (10176a): Switch remaining clear_user_page users over to clear_user_highpage
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git://linux-nfs.org/~bfields/linuxLinus Torvalds authored
* 'for-2.6.29' of git://linux-nfs.org/~bfields/linux: (67 commits) nfsd: get rid of NFSD_VERSION nfsd: last_byte_offset nfsd: delete wrong file comment from nfsd/nfs4xdr.c nfsd: git rid of nfs4_cb_null_ops declaration nfsd: dprint each op status in nfsd4_proc_compound nfsd: add etoosmall to nfserrno NFSD: FIDs need to take precedence over UUIDs SUNRPC: The sunrpc server code should not be used by out-of-tree modules svc: Clean up deferred requests on transport destruction nfsd: fix double-locks of directory mutex svc: Move kfree of deferral record to common code CRED: Fix NFSD regression NLM: Clean up flow of control in make_socks() function NLM: Refactor make_socks() function nfsd: Ensure nfsv4 calls the underlying filesystem on LOCKT SUNRPC: Ensure the server closes sockets in a timely fashion NFSD: Add documenting comments for nfsctl interface NFSD: Replace open-coded integer with macro NFSD: Fix a handful of coding style issues in write_filehandle() NFSD: clean up failover sysctl function naming ...
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David S. Miller authored
As reported by Sam Ravnborg, Gcc-3.4.5 does not handle: if (get_user() || get_user()) with the new branch tracer enabled. Just seperate it out into seperate statements for now so people can get work done. Signed-off-by:David S. Miller <davem@davemloft.net>
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Mauro Carvalho Chehab authored
This patch updates the MAINTAINERS entries for the media drivers. We are doing a few changes during 2009 to improve patch handling for drivers/media stuff. Currently, v4l-dvb-maintainer list at linuxtv.org were used to to be v4l/dvb driver maintainers ML, in order to keep track of patch merge requests and to receive bug fixes. This list allows posting for everybody, but, in order to avoid spam, the user subscribe/unsubscribe at the ML is moderated. Other development discussions and end-user forums happened on two separated ML (one for V4L and another for DVB). At the beginning of 2009, we've created linux-media@vger.kernel.org, meaning to be the main upstream development mailing list for drivers/media, including V4L and DVB core and drivers. The choice for vger.kernel.org were due to the fact that most of upstream lists are there. Also, its anti-spam filtering rules are better than what we currently have at linuxtv.org. For now, both video4linux-list and linux-dvb ML will remain active, but more focused on end users. It is expected that those lists will gradually be replaced also by linux-media@vger.kernel.org. This patch reflect those changes at linux MAINTAINERS file. Since the development and bug fix discussions will now happen at linux-media@vger.kernel.org, this patch does the following changes - replaces v4l-dvb-maintainer ML for the new linux-media@vger.kernel.org; - replaces video4linux ML for the new linux-media@vger.kernel.org; While here, it also: - Fixes the existing -git tree entries for drivers/media (since the repository name changed); - Adds the missing drivers/media -git tree entry on a few maintainers entries that don't point to a tree. Signed-off-by:Mauro Carvalho Chehab <mchehab@redhat.com>
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Mauro Carvalho Chehab authored
As Randy Dunlap <randy.dunlap@oracle.com> reported, cx88 has some compilation issues: drivers/built-in.o: In function `cx88_call_i2c_clients': (.text+0x20af17): undefined reference to `videobuf_dvb_get_frontend' drivers/built-in.o: In function `cx8802_probe': cx88-mpeg.c:(.devinit.text+0x268c4): undefined reference to `videobuf_dvb_alloc_frontend' cx88-mpeg.c:(.devinit.text+0x268ea): undefined reference to `videobuf_dvb_dealloc_frontends' With those configs: CONFIG_VIDEO_CX88=y CONFIG_VIDEO_CX88_BLACKBIRD=y CONFIG_VIDEO_CX88_DVB=m CONFIG_DVB_CORE=m After carefully examining the code, with the current code, several cx88 drivers (cx8800, cx8802, cx88_dvb and cx88_blackbird) should be compiled as a module, if one of them is marked as such. Just fixing Kconfig could create a very complex set of rules. Also, this hides a problem with the current approach where the dvb functionality weren't confined inside dvb module. What happens is that: - cx88-i2c (part of cx8800) has some special rules if DVB; - cx88-mpeg (cx8802 module) has also part of DVB init code; - cx88-dvb has the rest of the dvb code; - cx88-blackbird can be used with cx88-mpeg, having cx88-dvb or not. So, instead of doing some tricks at Kconfig and wait for a next breakage, this patch moves the dvb code inside cx88-i2c and cx88-mpeg into cx88-dvb. Another problem is that cx8802 were being compiled, even without cx88-dvb and cx88-blackbird modules. While on this code, let's fix also a reported problem: http://www.linuxtv.org/pipermail/linux-dvb/2009-January/031225.html A solution for the issue were proposed here: http://www.mail-archive.com/linux-media@vger.kernel.org/msg00021.html Thanks to Randy, Andy, Gregoire and Thomas for helping us to detect and solve the issues. Signed-off-by:
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Mauro Carvalho Chehab authored
As reported by Randy Dunlap <randy.dunlap@oracle.com>: With CONFIG_INPUT=m and CONFIG_DVB_DM1105=y: drivers/built-in.o: In function `input_sync': dm1105.c:(.text+0x120c33): undefined reference to `input_event' drivers/built-in.o: In function `dm1105_emit_key': dm1105.c:(.text+0x120c6c): undefined reference to `input_event' dm1105.c:(.text+0x120c82): undefined reference to `input_event' dm1105.c:(.text+0x120cb2): undefined reference to `input_event' dm1105.c:(.text+0x120cd1): undefined reference to `input_event' drivers/built-in.o: In function `dm1105_ir_init': (.devinit.text+0xd8ae): undefined reference to `input_allocate_device' drivers/built-in.o: In function `dm1105_ir_init': (.devinit.text+0xd9f6): undefined reference to `input_register_device' drivers/built-in.o: In function `dm1105_ir_init': (.devinit.text+0xda09): undefined reference to `input_free_device' drivers/built-in.o: In function `dm1105_ir_exit': (.devexit.text+0xcde): undefined reference to `input_unregister_device' This is due to the lack of a dependency between dm1105 and CONFIG_INPUT Cc: Igor M. Liplianin <liplianin@me.by> Signed-off-by: -
Julia Lawall authored
This patch extends 13417982 by using usb_endpoint_xfer_control, usb_endpoint_xfer_isoc, usb_endpoint_xfer_bulk, and usb_endpoint_xfer_int in the negated case as well. The semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ struct usb_endpoint_descriptor *epd; @@ - (usb_endpoint_type(epd) != \(USB_ENDPOINT_XFER_CONTROL\|0\)) + !usb_endpoint_xfer_control(epd) @@ struct usb_endpoint_descriptor *epd; @@ - (usb_endpoint_type(epd) != \(USB_ENDPOINT_XFER_ISOC\|1\)) + !usb_endpoint_xfer_isoc(epd) @@ struct usb_endpoint_descriptor *epd; @@ - (usb_endpoint_type(epd) != \(USB_ENDPOINT_XFER_BULK\|2\)) + !usb_endpoint_xfer_bulk(epd) @@ struct usb_endpoint_descriptor *epd; @@ - (usb_endpoint_type(epd) != \(USB_ENDPOINT_XFER_INT\|3\)) + !usb_endpoint_xfer_int(epd) // </smpl> Signed-off-by:
Julia Lawall <julia@diku.dk> Signed-off-by:
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Michael Krufky authored
Don't call tda8290_init_tuner unless we have either a TDA8275 or TDA8275A present. Calling this function will cause a TDA18271 to get sick, so we should only call it when needed. Signed-off-by:
Michael Krufky <mkrufky@linuxtv.org> Signed-off-by:
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