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2010-03-08Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (62 commits) msi-laptop: depends on RFKILL msi-laptop: Detect 3G device exists by standard ec command msi-laptop: Add resume method for set the SCM load again msi-laptop: Support some MSI 3G netbook that is need load SCM msi-laptop: Add threeg sysfs file for support query 3G state by standard 66/62 ec command msi-laptop: Support standard ec 66/62 command on MSI notebook and nebook Driver core: create lock/unlock functions for struct device sysfs: fix for thinko with sysfs_bin_attr_init() sysfs: Kill unused sysfs_sb variable. sysfs: Pass super_block to sysfs_get_inode driver core: Use sysfs_rename_link in device_rename sysfs: Implement sysfs_rename_link sysfs: Pack sysfs_dirent more tightly. sysfs: Serialize updates to the vfs inode sysfs: windfarm: init sysfs attributes sysfs: Use sysfs_attr_init and sysfs_bin_attr_init on module dynamic attributes sysfs: Document sysfs_attr_init and sysfs_bin_attr_init sysfs: Use sysfs_attr_init and sysfs_bin_attr_init on dynamic attributes sysfs: Use one lockdep class per sysfs attribute. sysfs: Only take active references on attributes. ...
2010-03-08[S390] smsgiucv: declare char pointers as "const"Hendrik Brueckner
Declare the smsgiucv prefix char pointer as "const" and use use const char pointers in callback functions. Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-03-08[S390] remove unused qdio flags in zfcp and qethUrsula Braun
zfcp and qeth are setting flags for the qdio-layer, but these flags are not used in qdio. Patch removes the flag definitions from qdio and their settings in zfcp and qeth. Cc: Jan Glauber <jang@linux.vnet.ibm.com> Cc: Christof Schmitt <christof.schmitt@de.ibm.com> Signed-off-by: Ursula Braun <ursula.braun@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-03-08[S390] Cleanup xtime usageJohn Stultz
This replaces direct xtime usage in the s390 arch with timekeeping accessors, so we can further clean up the timekeeping core. Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: John Stultz <johnstul@us.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-03-08[S390] uaccess: make sure copy_from_user_overflow is builtinHeiko Carstens
If there is no in kernel image caller modules will suffer: ERROR: "copy_from_user_overflow" [net/core/pktgen.ko] undefined! ERROR: "copy_from_user_overflow" [net/can/can-raw.ko] undefined! ERROR: "copy_from_user_overflow" [fs/cifs/cifs.ko] undefined! Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-03-07sysdev: fix missing s390 conversionHeiko Carstens
In linux-next "sysdev: Pass attribute in sysdev_class attributes show/store" forgot to convert one place in s390 code. Here is the missing part. Cc: Andi Kleen <ak@linux.intel.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-07sysdev: Pass attribute in sysdev_class attributes show/storeAndi Kleen
Passing the attribute to the low level IO functions allows all kinds of cleanups, by sharing low level IO code without requiring an own function for every piece of data. Also drivers can extend the attributes with own data fields and use that in the low level function. Similar to sysdev_attributes and normal attributes. This is a tree-wide sweep, converting everything in one go. No functional changes in this patch other than passing the new argument everywhere. Tested on x86, the non x86 parts are uncompiled. Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2010-03-05Merge branch 'kvm-updates/2.6.34' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
* 'kvm-updates/2.6.34' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (145 commits) KVM: x86: Add KVM_CAP_X86_ROBUST_SINGLESTEP KVM: VMX: Update instruction length on intercepted BP KVM: Fix emulate_sys[call, enter, exit]()'s fault handling KVM: Fix segment descriptor loading KVM: Fix load_guest_segment_descriptor() to inject page fault KVM: x86 emulator: Forbid modifying CS segment register by mov instruction KVM: Convert kvm->requests_lock to raw_spinlock_t KVM: Convert i8254/i8259 locks to raw_spinlocks KVM: x86 emulator: disallow opcode 82 in 64-bit mode KVM: x86 emulator: code style cleanup KVM: Plan obsolescence of kernel allocated slots, paravirt mmu KVM: x86 emulator: Add LOCK prefix validity checking KVM: x86 emulator: Check CPL level during privilege instruction emulation KVM: x86 emulator: Fix popf emulation KVM: x86 emulator: Check IOPL level during io instruction emulation KVM: x86 emulator: fix memory access during x86 emulation KVM: x86 emulator: Add Virtual-8086 mode of emulation KVM: x86 emulator: Add group9 instruction decoding KVM: x86 emulator: Add group8 instruction decoding KVM: do not store wqh in irqfd ... Trivial conflicts in Documentation/feature-removal-schedule.txt
2010-03-04Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (52 commits) init: Open /dev/console from rootfs mqueue: fix typo "failues" -> "failures" mqueue: only set error codes if they are really necessary mqueue: simplify do_open() error handling mqueue: apply mathematics distributivity on mq_bytes calculation mqueue: remove unneeded info->messages initialization mqueue: fix mq_open() file descriptor leak on user-space processes fix race in d_splice_alias() set S_DEAD on unlink() and non-directory rename() victims vfs: add NOFOLLOW flag to umount(2) get rid of ->mnt_parent in tomoyo/realpath hppfs can use existing proc_mnt, no need for do_kern_mount() in there Mirror MS_KERNMOUNT in ->mnt_flags get rid of useless vfsmount_lock use in put_mnt_ns() Take vfsmount_lock to fs/internal.h get rid of insanity with namespace roots in tomoyo take check for new events in namespace (guts of mounts_poll()) to namespace.c Don't mess with generic_permission() under ->d_lock in hpfs sanitize const/signedness for udf nilfs: sanitize const/signedness in dealing with ->d_name.name ... Fix up fairly trivial (famous last words...) conflicts in drivers/infiniband/core/uverbs_main.c and security/tomoyo/realpath.c
2010-03-03Simplify failure exits in s390/hypfs fill_super()Al Viro
->kill_sb() will be called after any failure exit, so no need to duplicate what it can do. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2010-03-02Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1341 commits) virtio_net: remove forgotten assignment be2net: fix tx completion polling sis190: fix cable detect via link status poll net: fix protocol sk_buff field bridge: Fix build error when IGMP_SNOOPING is not enabled bnx2x: Tx barriers and locks scm: Only support SCM_RIGHTS on unix domain sockets. vhost-net: restart tx poll on sk_sndbuf full vhost: fix get_user_pages_fast error handling vhost: initialize log eventfd context pointer vhost: logging thinko fix wireless: convert to use netdev_for_each_mc_addr ethtool: do not set some flags, if others failed ipoib: returned back addrlen check for mc addresses netlink: Adding inode field to /proc/net/netlink axnet_cs: add new id bridge: Make IGMP snooping depend upon BRIDGE. bridge: Add multicast count/interval sysfs entries bridge: Add hash elasticity/max sysfs entries bridge: Add multicast_snooping sysfs toggle ... Trivial conflicts in Documentation/feature-removal-schedule.txt
2010-03-01Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (100 commits) ARM: Eliminate decompressor -Dstatic= PIC hack ARM: 5958/1: ARM: U300: fix inverted clk round rate ARM: 5956/1: misplaced parentheses ARM: 5955/1: ep93xx: move timer defines into core.c and document ARM: 5954/1: ep93xx: move gpio interrupt support to gpio.c ARM: 5953/1: ep93xx: fix broken build of clock.c ARM: 5952/1: ARM: MM: Add ARM_L1_CACHE_SHIFT_6 for handle inside each ARCH Kconfig ARM: 5949/1: NUC900 add gpio virtual memory map ARM: 5948/1: Enable timer0 to time4 clock support for nuc910 ARM: 5940/2: ARM: MMCI: remove custom DBG macro and printk ARM: make_coherent(): fix problems with highpte, part 2 MM: Pass a PTE pointer to update_mmu_cache() rather than the PTE itself ARM: 5945/1: ep93xx: include correct irq.h in core.c ARM: 5933/1: amba-pl011: support hardware flow control ARM: 5930/1: Add PKMAP area description to memory.txt. ARM: 5929/1: Add checks to detect overlap of memory regions. ARM: 5928/1: Change type of VMALLOC_END to unsigned long. ARM: 5927/1: Make delimiters of DMA area globally visibly. ARM: 5926/1: Add "Virtual kernel memory..." printout. ARM: 5920/1: OMAP4: Enable L2 Cache ... Fix up trivial conflict in arch/arm/mach-mx25/clock.c
2010-03-01KVM: fix cleanup_srcu_struct on vm destructionMarcelo Tosatti
cleanup_srcu_struct on VM destruction remains broken: BUG: unable to handle kernel paging request at ffffffffffffffff IP: [<ffffffff802533d2>] srcu_read_lock+0x16/0x21 RIP: 0010:[<ffffffff802533d2>] [<ffffffff802533d2>] srcu_read_lock+0x16/0x21 Call Trace: [<ffffffffa05354c4>] kvm_arch_vcpu_uninit+0x1b/0x48 [kvm] [<ffffffffa05339c6>] kvm_vcpu_uninit+0x9/0x15 [kvm] [<ffffffffa0569f7d>] vmx_free_vcpu+0x7f/0x8f [kvm_intel] [<ffffffffa05357b5>] kvm_arch_destroy_vm+0x78/0x111 [kvm] [<ffffffffa053315b>] kvm_put_kvm+0xd4/0xfe [kvm] Move it to kvm_arch_destroy_vm. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Reported-by: Jan Kiszka <jan.kiszka@siemens.com>
2010-03-01KVM: switch vcpu context to use SRCUMarcelo Tosatti
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-03-01KVM: split kvm_arch_set_memory_region into prepare and commitMarcelo Tosatti
Required for SRCU convertion later. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-02-28Merge branch 'master' of /home/davem/src/GIT/linux-2.6/David S. Miller
Conflicts: drivers/firmware/iscsi_ibft.c
2010-02-28Merge branch 'tracing-core-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'tracing-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (28 commits) ftrace: Add function names to dangling } in function graph tracer tracing: Simplify memory recycle of trace_define_field tracing: Remove unnecessary variable in print_graph_return tracing: Fix typo of info text in trace_kprobe.c tracing: Fix typo in prof_sysexit_enable() tracing: Remove CONFIG_TRACE_POWER from kernel config tracing: Fix ftrace_event_call alignment for use with gcc 4.5 ftrace: Remove memory barriers from NMI code when not needed tracing/kprobes: Add short documentation for HAVE_REGS_AND_STACK_ACCESS_API s390: Add pt_regs register and stack access API tracing/kprobes: Make Kconfig dependencies generic tracing: Unify arch_syscall_addr() implementations tracing: Add notrace to TRACE_EVENT implementation functions ftrace: Allow to remove a single function from function graph filter tracing: Add correct/incorrect to sort keys for branch annotation output tracing: Simplify test for function_graph tracing start point tracing: Drop the tr check from the graph tracing path tracing: Add stack dump to trace_printk if stacktrace option is set tracing: Use appropriate perl constructs in recordmcount.pl tracing: optimize recordmcount.pl for offsets-handling ...
2010-02-27Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6Linus Torvalds
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: (35 commits) [S390] time: remove unused code [S390] zcore: Add prefix registers to dump header [S390] correct vdso version string [S390] add support for compressed kernels [S390] Define new s390 ELF note sections in elf.h [S390] codepage conversion of kernel parameter line [S390] seq_file: convert drivers/s390/ [S390] add z9-ec/z10 instruction to kernel disassembler [S390] dasd: correct offline processing [S390] dasd: fix refcounting. [S390] dasd: fix online/offline race [S390] use kprobes_built_in() in mm/fault code [S390] bug: use relative pointers in bug table entries [S390] Cleanup struct _lowcore usage and defines. [S390] free_initmem: reduce code duplication [S390] Replace ENOTSUPP usage with EOPNOTSUPP [S390] spinlock: check virtual cpu running status [S390] sysinfo: fix SYSIB 3,2,2 structure [S390] add MACHINE_IS_LPAR flag [S390] qdio: optimize cache line usage of struct qdio_irq ...
2010-02-27Merge branch 'tracing/core' of ↵Ingo Molnar
git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing into tracing/core
2010-02-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (31 commits) crypto: aes_generic - Fix checkpatch errors crypto: fcrypt - Fix checkpatch errors crypto: ecb - Fix checkpatch errors crypto: des_generic - Fix checkpatch errors crypto: deflate - Fix checkpatch errors crypto: crypto_null - Fix checkpatch errors crypto: cipher - Fix checkpatch errors crypto: crc32 - Fix checkpatch errors crypto: compress - Fix checkpatch errors crypto: cast6 - Fix checkpatch errors crypto: cast5 - Fix checkpatch errors crypto: camellia - Fix checkpatch errors crypto: authenc - Fix checkpatch errors crypto: api - Fix checkpatch errors crypto: anubis - Fix checkpatch errors crypto: algapi - Fix checkpatch errors crypto: blowfish - Fix checkpatch errors crypto: aead - Fix checkpatch errors crypto: ablkcipher - Fix checkpatch errors crypto: pcrypt - call the complete function on error ...
2010-02-26[S390] time: remove unused codeHeiko Carstens
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] correct vdso version stringMartin Schwidefsky
The glibc vdso code for s390 uses the version string 2.6.29, the kernel uses the version string 2.6.26. No wonder the vdso code is never used. The first kernel version to contain the vdso code is 2.6.29 which makes this the correct version. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] add support for compressed kernelsMartin Schwidefsky
Add the "bzImage" compile target and the necessary code to generate compressed kernel images. The old style uncompressed "image" target is preserved, a simple make will build them both. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] codepage conversion of kernel parameter lineMartin Schwidefsky
Move the ebcdic to ascii conversion of the kernel parameter line from head.S to early.c and convert the assembler code to C. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] add z9-ec/z10 instruction to kernel disassemblerMartin Schwidefsky
Add the instruction of the z9-ec and z10 machines to the kernel disassembler. Add the missing "ptff" instruction of z9-109 and the missing "sqd" of g5. Remove useless comments with instruction examples from format table. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] use kprobes_built_in() in mm/fault codeHeiko Carstens
Use kprobes_built_in() to avoid ifdefs like most other architectures do. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] bug: use relative pointers in bug table entriesHeiko Carstens
Reduces the size of the bug table entries by 50% on 64bit kernels. Saves around 30kb on a defconfig kernel. s390 version of b93a531e "allow bug table entries to use relative pointers (and use it on x86-64)". Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] Cleanup struct _lowcore usage and defines.Heiko Carstens
Use asm offsets to make sure the offset defines to struct _lowcore and its layout don't get out of sync. Also add a BUILD_BUG_ON() which checks that the size of the structure is sane. And while being at it change those sites which use odd casts to access the current lowcore. These should use S390_lowcore instead. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] free_initmem: reduce code duplicationHeiko Carstens
free_initmem() and free_initrd_mem() are nearly identical. So make them call a common function. Also fixes a bug: if the initrd wouldn't start on a page boundary also memory after the initrd would be initialized with the poison value. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] Replace ENOTSUPP usage with EOPNOTSUPPHeiko Carstens
ENOTSUPP is not supposed to leak to userspace so lets just use EOPNOTSUPP everywhere. Doesn't fix a bug, but makes future reviews easier. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] spinlock: check virtual cpu running statusGerald Schaefer
This patch introduces a new function that checks the running status of a cpu in a hypervisor. This status is not virtualized, so the check is only correct if running in an LPAR. On acquiring a spinlock, if the cpu holding the lock is scheduled by the hypervisor, we do a busy wait on the lock. If it is not scheduled, we yield over to that cpu. Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] sysinfo: fix SYSIB 3,2,2 structureHeiko Carstens
The size of the field that contains the description block count is only four bits instead of eight bits. The first four bits are reserved but this might change and break. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] add MACHINE_IS_LPAR flagMartin Schwidefsky
Introduce the MACHINE_IS_LPAR flag for code that should only be executed if Linux is running in an LPAR. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] qdio: optimize cache line usage of struct qdio_irqJan Glauber
Remove a memset hack that relied on the internal layout of the qdio_irq struct and move the per device statistics data into an own cache line to avoid cache line bashing between the inbound and the outbound queue tasklets. Also reduce the number of allocated queues from 32 to 4 which is the current maximum. That saves a cache line in struct qdio_irq. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] smp: rework sigp codeHeiko Carstens
Rename signal_processor* functions to sigp*. Add raw variants of each version, so we can get rid of the hacks played in smp code which establish temporary cpu logical mappings so they could call the sigp functions. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] smp: always reboot on cpu 0Heiko Carstens
Always reboot on logical cpu 0. This makes sure that the IPL cpu is always the same and usually avoids strange numbering schemes between physical and logical cpus. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] smp: rename and add lowcore definesHeiko Carstens
Rename __LC_RESTART_PSW to __LC_RST_NEW_PSW, add a define for the missing 32 bit variant and the missing old PSWs. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] zfcpdump: remove cross arch dump supportHeiko Carstens
Remove support to be able to dump 31 bit systems with a 64 bit dumper. This is mostly useless since no distro ships 31 bit kernels together with a 64 bit dumper. We also get rid of a bit of hacky code. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] use inline assembly contraints available with gcc 3.3.3Martin Schwidefsky
Drop support to compile the kernel with gcc versions older than 3.3.3. This allows us to use the "Q" inline assembly contraint on some more inline assemblies without duplicating a lot of complex code (e.g. __xchg and __cmpxchg). The distinction for older gcc versions can be removed which saves a few lines and simplifies the code. Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] cio: fix storage key handlingHeiko Carstens
Some parts of cio do not shift PAGE_DEFAULT_KEY correctly and end up with an incorrect key in their data structures. Since the default key is zero this doesn't really matter. However if somebody would use key-controlled protection for debugging purposes it would be quite helpful if all of this would work as expected. Also remove a stale declaration. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] cio: wait for channel reportSebastian Ott
To fetch a pending channel report word (crw) we use a kernel thread which triggers stcrw and sleeps on a semaphore. The s390 machine check handler uses crw_handle_channel_report to handle one crw if needed. This patch replaces the semaphore with a waitqueue (to block the kernel thread) and an atomic_t (to count the number of pending requests). By this we achieve the ability to force this thread to check for a pending crw (independent on when it is triggered by the machine check handler) and wait for this action to finish. Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-26[S390] uaccess: implement strict user copy checksHeiko Carstens
Same as on x86 and sparc, besides the fact that enabling the option will just emit compile time warnings instead of errors. Keeps allyesconfig kernels compiling. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-02-20MM: Pass a PTE pointer to update_mmu_cache() rather than the PTE itselfRussell King
On VIVT ARM, when we have multiple shared mappings of the same file in the same MM, we need to ensure that we have coherency across all copies. We do this via make_coherent() by making the pages uncacheable. This used to work fine, until we allowed highmem with highpte - we now have a page table which is mapped as required, and is not available for modification via update_mmu_cache(). Ralf Beache suggested getting rid of the PTE value passed to update_mmu_cache(): On MIPS update_mmu_cache() calls __update_tlb() which walks pagetables to construct a pointer to the pte again. Passing a pte_t * is much more elegant. Maybe we might even replace the pte argument with the pte_t? Ben Herrenschmidt would also like the pte pointer for PowerPC: Passing the ptep in there is exactly what I want. I want that -instead- of the PTE value, because I have issue on some ppc cases, for I$/D$ coherency, where set_pte_at() may decide to mask out the _PAGE_EXEC. So, pass in the mapped page table pointer into update_mmu_cache(), and remove the PTE value, updating all implementations and call sites to suit. Includes a fix from Stephen Rothwell: sparc: fix fallout from update_mmu_cache API change Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2010-02-17s390: Add pt_regs register and stack access APIHeiko Carstens
This API is needed for the kprobe-based event tracer. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> LKML-Reference: <20100212123840.GB27548@osiris.boeblingen.de.ibm.com> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2010-02-17tracing: Unify arch_syscall_addr() implementationsMike Frysinger
Most implementations of arch_syscall_addr() are the same, so create a default version in common code and move the one piece that differs (the syscall table) to asm/syscall.h. New arch ports don't have to waste time copying & pasting this simple function. The s390/sparc versions need to be different, so document why. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> LKML-Reference: <1264498803-17278-1-git-send-email-vapier@gentoo.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2010-02-16Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
2010-02-09[S390] Fix struct _lowcore layout.Heiko Carstens
Offsets and sizes are wrong for 32 bit. Got broken with 866ba284 "[S390] cleanup lowcore.h". Reported-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-01-27[S390] fix single stepped svcs with TRACE_IRQFLAGS=yMartin Schwidefsky
If irq flags tracing is enabled the TRACE_IRQS_ON macros expands to a function call which clobbers registers %r0-%r5. The macro is used in the code path for single stepped system calls. The argument registers %r2-%r6 need to be restored from the stack before the system call function is called. Cc: stable@kernel.org Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-01-27[S390] use set_current_state in sigsuspendMartin Schwidefsky
Use set_current_state instead of a direct assignment to set the task state of the current process. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2010-01-27[S390] irqflags: add missing types.h includeHeiko Carstens
Add missing types.h include. Otherwise would cause build breakages on hw breakpoint support, because of undefined BITS_PER_LONG. Also fix up the copyright line and remove the superfluous __KERNEL__ ifdef. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>