- 23 May, 2011 30 commits
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Martin Schwidefsky authored
Move gds vector/subvector find functions to the sclp header file. Simplify event buffer dissection in sclp tty code. Signed-off-by:Martin Schwidefsky <schwidefsky@de.ibm.com>
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Sebastian Ott authored
Update affected channel path descriptors when receiving channel path availability information. Signed-off-by:
Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by:
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Martin Schwidefsky authored
Rework the architecture page table functions to access the bits in the page table extension array (pgste). There are a number of changes: 1) Fix missing pgste update if the attach_count for the mm is <= 1. 2) For every operation that affects the invalid bit in the pte or the rcp byte in the pgste the pcl lock needs to be acquired. The function pgste_get_lock gets the pcl lock and returns the current pgste value for a pte pointer. The function pgste_set_unlock stores the pgste and releases the lock. Between these two calls the bits in the pgste can be shuffled. 3) Define two software bits in the pte _PAGE_SWR and _PAGE_SWC to avoid calling SetPageDirty and SetPageReferenced from pgtable.h. If the host reference backup bit or the host change backup bit has been set the dirty/referenced state is transfered to the pte. The common code will pick up the state from the pte. 4) Add ptep_modify_prot_start and ptep_modify_prot_commit for mprotect. 5) Remove pgd_populate_kernel, pud_populate_kernel, pmd_populate_kernel pgd_clear_kernel, pud_clear_kernel, pmd_clear_kernel and ptep_invalidate. 6) Rename kvm_s390_test_and_clear_page_dirty to ptep_test_and_clear_user_dirty and add ptep_test_and_clear_user_young. 7) Define mm_exclusive() and mm_has_pgste() helper to improve readability. Signed-off-by: -
Martin Schwidefsky authored
The page_clear_dirty primitive always sets the default storage key which resets the access control bits and the fetch protection bit. That will surprise a KVM guest that sets non-zero access control bits or the fetch protection bit. Merge page_test_dirty and page_clear_dirty back to a single function and only clear the dirty bit from the storage key. In addition move the function page_test_and_clear_dirty and page_test_and_clear_young to page.h where they belong. This requires to change the parameter from a struct page * to a page frame number. Signed-off-by: -
Jan Glauber authored
Prevent the following compile warning for !CONFIG_64BIT: CC drivers/s390/cio/qdio_main.o drivers/s390/cio/qdio_main.c: In function ‘handle_outbound’: drivers/s390/cio/qdio_main.c:1449: warning: ‘state’ may be used uninitialized in this function Signed-off-by:
Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by:
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Heiko Carstens authored
The sendmask check is not needed. Remove it. Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
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KOSAKI Motohiro authored
Adapt new API. Signed-off-by:
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by:
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Heiko Carstens authored
Small code cleanup. Signed-off-by:
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Heiko Carstens authored
On cpu hot remove a PFAULT CANCEL command is sent to the hypervisor which in turn will cancel all outstanding pfault requests that have been issued on that cpu (the same happens with a SIGP cpu reset). The result is that we end up with uninterruptible processes where the interrupt that would wake up these processes never arrives. In order to solve this all processes which wait for a pfault completion interrupt get woken up after a cpu hot remove. The worst case that could happen is that they fault again and in turn need to wait again. Signed-off-by:
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Heiko Carstens authored
Add missing __noreturn attribute to cpu_die(): arch/s390/kernel/smp.c:691:6: error: symbol 'cpu_die' redeclared with different type Signed-off-by:
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Heiko Carstens authored
Implement arch specific irqsafe_cpu ops. The arch specific ops do not disable/enable interrupts since that is an expensive operation. Instead we disable preemption and perform a compare and swap loop. Since on server distros (the ones we care about) preemption is disabled the preempt_disable()/preempt_enable() pair is a nop. In the end this code should be faster than the generic one. Signed-off-by:
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Peter Oberparleiter authored
The concepts of VDSO and gcov-based profiling don't mix: the former includes kernel-provided code running in userspace, the latter adds instructions that modify counters in kernel data segments. On s390 this has not been a problem so far due to VDSO code being written in all-assembler which is exempt from gcov-based profiling. This could change in the future, so disable profiling excplicitly for VDSO code. Signed-off-by:
Peter Oberparleiter <peter.oberparleiter@de.ibm.com> Signed-off-by:
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Holger Dengler authored
The registration of an ap device will be skipped, if the device type probing fails. Add names of current crypto adapters to the Kconfig help. Signed-off-by:
Holger Dengler <hd@linux.vnet.ibm.com> Signed-off-by:
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Heiko Carstens authored
Get rid of these: arch/s390/mm/extmem.c: In function 'segment_modify_shared': arch/s390/mm/extmem.c:622:3: warning: 'end_addr' may be used uninitialized in this function [-Wuninitialized] arch/s390/mm/extmem.c:627:18: warning: 'start_addr' may be used uninitialized in this function [-Wuninitialized] arch/s390/mm/extmem.c: In function 'segment_load': arch/s390/mm/extmem.c:481:11: warning: 'end_addr' may be used uninitialized in this function [-Wuninitialized] arch/s390/mm/extmem.c:480:18: warning: 'start_addr' may be used uninitialized in this function [-Wuninitialized] Signed-off-by:
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Heiko Carstens authored
Return codes are on purpose not handled or used. So remove them. Acked-by:
Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by:
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Heiko Carstens authored
Fix return code handling within monwrite_new_hdr(). Return code handling is everwhere implemented, the return code of the diagnose function was just not passed. Signed-off-by:
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Heiko Carstens authored
Check return value of itcw_add_dcw() for error code and return it. Signed-off-by:
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Heiko Carstens authored
Remove trivially unused variables as detected with -Wunused-but-set-variable. Signed-off-by:
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Heiko Carstens authored
Remove the tape block device driver. It's not of real use but has already created some confusion when users wanted to access tape devices and used the block device nodes instead of the character device nodes. Also remove the whole tape documentation since it's completely outdated and we have the device drivers book which is the place where everything is properly documented. Signed-off-by:
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Martin Schwidefsky authored
The noexec support on s390 does not rely on a bit in the page table entry but utilizes the secondary space mode to distinguish between memory accesses for instructions vs. data. The noexec code relies on the assumption that the cpu will always use the secondary space page table for data accesses while it is running in the secondary space mode. Up to the z9-109 class machines this has been the case. Unfortunately this is not true anymore with z10 and later machines. The load-relative-long instructions lrl, lgrl and lgfrl access the memory operand using the same addressing-space mode that has been used to fetch the instruction. This breaks the noexec mode for all user space binaries compiled with march=z10 or later. The only option is to remove the current noexec support. Signed-off-by: -
Sebastian Ott authored
In ccw_device_set_online we basically start path verification and wait for the device to reach a final state. If it turns out that the device has no useable path we schedule the deregistration of the device (which is still in an non-final state) and wake up the waiting process. The deregistration process will set a final state, but if the wake up happens to be prior to this, the device will hang forever in ccw_device_set_online. To fix this just set the final NOT_OPER state prior to the scheduled deregistration of the device. Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2Linus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2: nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty nilfs2: always set back pointer to host inode in mapping->host nilfs2: get rid of NILFS_I_NILFS nilfs2: use list_first_entry nilfs2: use empty_aops for gc-inodes nilfs2: implement resize ioctl nilfs2: add truncation routine of segment usage file nilfs2: add routine to move secondary super block nilfs2: add ioctl which limits range of segment to be allocated nilfs2: zero fill unused portion of super root block nilfs2: super root size should change depending on inode size nilfs2: get rid of private page allocator nilfs2: merge list_del()/list_add_tail() to list_move_tail()
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide-2.6: ide/ide-scan-pci.c: Use for_each_pci_dev(). ide: Use linux/mutex.h IDE: ide-floppy, remove unnecessary NULL check drivers/ide/pmac.c: Remove unnecessary casts of pci_get_drvdata ide: fix use after free in ide-acpi
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6: (28 commits) sparc32: fix build, fix missing cpu_relax declaration SCHED_TTWU_QUEUE is not longer needed since sparc32 now implements IPI sparc32,leon: Remove unnecessary page_address calls in LEON DMA API. sparc: convert old cpumask API into new one sparc32, sun4d: Implemented SMP IPIs support for SUN4D machines sparc32, sun4m: Implemented SMP IPIs support for SUN4M machines sparc32,leon: Implemented SMP IPIs for LEON CPU sparc32: implement SMP IPIs using the generic functions sparc32,leon: SMP power down implementation sparc32,leon: added some SMP comments sparc: add {read,write}*_be routines sparc32,leon: don't rely on bootloader to mask IRQs sparc32,leon: operate on boot-cpu IRQ controller registers sparc32: always define boot_cpu_id sparc32: removed unused code, implemented by generic code sparc32: avoid build warning at mm/percpu.c:1647 sparc32: always register a PROM based early console sparc32: probe for cpu info only during startup sparc: consolidate show_cpuinfo in cpu.c sparc32,leon: implement genirq CPU affinity ...
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git://neil.brown.name/mdLinus Torvalds authored
* 'for-linus' of git://neil.brown.name/md: md: allow resync_start to be set while an array is active. md/raid10: reformat some loops with less indenting. md/raid10: remove unused variable. md/raid10: make more use of 'slot' in raid10d. md/raid10: some tidying up in fix_read_error md/raid1: improve handling of pages allocated for write-behind. md/raid1: try fix_sync_read_error before process_checks. md/raid1: tidy up new functions: process_checks and fix_sync_read_error. md/raid1: split out two sub-functions from sync_request_write md: make error_handler functions more uniform and correct. md/multipath: discard ->working_disks in favour of ->degraded md/raid1: clean up read_balance. md: simplify raid10 read_balance md/bitmap: fix saving of events_cleared and other state. md: reject a re-add request that cannot be honoured. md: Fix race when creating a new md device.
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Randy Dunlap authored
Fix new kernel-doc Error and Warning in <net/mac80211.h>: Error(linux-2.6.39-git5/include/net/mac80211.h:550): cannot understand prototype: 'struct ieee80211_sched_scan_ies ' Warning(linux-2.6.39-git5/include/net/mac80211.h:2289): No description found for parameter 'sta' Signed-off-by:
Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds authored
The setup_smep function gets calle at resume time too, and is thus not a pure __init function. When marked as __init, it gets thrown out after the kernel has initialized, and when the kernel is suspended and resumed, the code will no longer be around, and we'll get a nice "kernel tried to execute NX-protected page" oops because the page is no longer marked executable. Reported-and-tested-by:
Parag Warudkar <parag.lkml@gmail.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: "H. Peter Anvin" <hpa@linux.intel.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Linus Torvalds authored
Commit e66eed65 ("list: remove prefetching from regular list iterators") removed the include of prefetch.h from list.h. The skbuff list traversal still had them. Quoth David Miller: "Please just remove the prefetches. Those are modelled after list.h as I intend to eventually convert SKB list handling to "struct list_head" but we're not there yet. Therefore if we kill prefetches from list.h we should kill it from these things in skbuff.h too." Requested-by:
David Miller <davem@davemloft.net> Signed-off-by:
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Paul Gortmaker authored
After discovering that wide use of prefetch on modern CPUs could be a net loss instead of a win, net drivers which were relying on the implicit inclusion of prefetch.h via the list headers showed up in the resulting cleanup fallout. Give them an explicit include via the following $0.02 script. ========================================= #!/bin/bash MANUAL="" for i in `git grep -l 'prefetch(.*)' .` ; do grep -q '<linux/prefetch.h>' $i if [ $? = 0 ] ; then continue fi ( echo '?^#include <linux/?a' echo '#include <linux/prefetch.h>' echo . echo w echo q ) | ed -s $i > /dev/null 2>&1 if [ $? != 0 ]; then echo $i needs manual fixup MANUAL="$i $MANUAL" fi done echo ------------------- 8\<---------------------- echo vi $MANUAL ========================================= Signed-off-by:
Paul <paul.gortmaker@windriver.com> [ Fixed up some incorrect #include placements, and added some non-network drivers and the fib_trie.c case - Linus ] Signed-off-by:
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Sam Ravnborg authored
Fix following sparc (32 bit) build error: CC arch/sparc/kernel/asm-offsets.s In file included from include/linux/seqlock.h:29:0, from include/linux/time.h:8, from include/linux/timex.h:56, from include/linux/sched.h:57, from arch/sparc/kernel/asm-offsets.c:13: include/linux/spinlock.h: In function 'spin_unlock_wait': include/linux/spinlock.h:360:2: error: implicit declaration of function 'cpu_relax' Most likely caused by commit e66eed65 ("list: remove prefetching from regular list iterators") due to include changes. Signed-off-by:Sam Ravnborg <sam@ravnborg.org> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
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- 22 May, 2011 6 commits
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Linus Torvalds authored
I still happen to believe that I$ miss costs are a major thing, but sadly, -Os doesn't seem to be the solution. With or without it, gcc will miss some obvious code size improvements, and with it enabled gcc will sometimes make choices that aren't good even with high I$ miss ratios. For example, with -Os, gcc on x86 will turn a 20-byte constant memcpy into a "rep movsl". While I sincerely hope that x86 CPU's will some day do a good job at that, they certainly don't do it yet, and the cost is higher than a L1 I$ miss would be. Some day I hope we can re-enable this. Signed-off-by: -
git://github.com/schandinat/linux-2.6Linus Torvalds authored
* 'viafb-next' of git://github.com/schandinat/linux-2.6: (24 commits) viafb: Automatic OLPC XO-1.5 configuration viafb: remove unused CEA mode viafb: try to map less memory in case of failure viafb: use write combining for video ram viafb: add X server compatibility mode viafb: reduce OLPC refresh a bit viafb: fix OLPC XO 1.5 device connection viafb: fix OLPC DCON refresh rate viafb: delete clock and PLL initialization viafb: replace custom return values viafb: some small cleanup for global variables viafb: gather common good, old VGA initialization in one place viafb: add engine clock support viafb: add VIA slapping capability viafb: split clock and PLL code to an extra file viafb: add primary/secondary clock on/off switches viafb: add clock source selection and PLL power management support viafb: prepare for PLL separation viafb: call viafb_get_clk_value only in viafb_set_vclock viafb: remove unused max_hres/vres ...
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6Linus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6: [PARISC] wire up syncfs syscall [PARISC] wire up the fhandle syscalls [PARISC] wire up clock_adjtime syscall [PARISC] wire up fanotify syscalls [PARISC] prevent speculative re-read on cache flush [PARISC] only make executable areas executable [PARISC] fix pacache .size with new binutils
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Heiko Carstens authored
Fixes build errors on s390 and probably other archs as well: In file included from net/ipv4/ip_forward.c:32:0: include/net/udp.h: In function 'udp_csum_outgoing': include/net/udp.h:141:2: error: implicit declaration of function 'prefetch' Signed-off-by:
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Heiko Carstens authored
Fixes this build error on s390 and probably other archs as well: fs/inode.c: In function 'new_inode': fs/inode.c:894:2: error: implicit declaration of function 'spin_lock_prefetch' Signed-off-by:
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James Bottomley authored
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- 21 May, 2011 4 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6Linus Torvalds authored
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6: firewire: sbp2: parallelize login, reconnect, logout firewire: sbp2: octlet AT payloads can be stack-allocated firewire: sbp2: omit Scsi_Host lock from queuecommand firewire: core: use non-reentrant workqueue with rescuer firewire: optimize iso queueing by setting wake only after the last packet firewire: octlet AT payloads can be stack-allocated firewire: ohci: optimize find_branch_descriptor() firewire: ohci: avoid separate DMA mapping for small AT payloads firewire: ohci: do not start DMA contexts before link is enabled
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6Linus Torvalds authored
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6: sctp: Fix build failure. garp: use kfree_rcu() ipv6: copy prefsrc setting when copying route entry
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Erez Zadok authored
This solves a serious VFS-level bug in nested_symlink (which was rewritten from do_follow_link), and follows the order of depth tests that existed before. The bug triggers a BUG_ON in fs/namei.c:1381, when running racer with symlink and rename ops. Signed-off-by:
Erez Zadok <ezk@cs.sunysb.edu> Acked-by:
Miklos Szeredi <mszeredi@suse.cz> Cc: stable@kernel.org Signed-off-by:
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David S. Miller authored
Commit c182f90b ("SCTP: fix race between sctp_bind_addr_free() and sctp_bind_addr_conflict()") and commit 1231f0ba ("net,rcu: convert call_rcu(sctp_local_addr_free) to kfree_rcu()"), happening in different trees, introduced a build failure. Simply make the SCTP race fix use kfree_rcu() too. Signed-off-by:
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