diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-15 17:31:43 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-15 17:31:43 -0700 |
| commit | 7a1b29a82ba76427de791098c095ce31dab9333d (patch) | |
| tree | 077a1563ce243b6ac619397a0b7904623a28de50 /arch/tile/mm/fault.c | |
| parent | d7824370e26325c881b665350ce64fb0a4fde24a (diff) | |
| parent | a5854dd7f30c3849edf9b9711362e2dd51d3f855 (diff) | |
| download | kernel_samsung_aries-7a1b29a82ba76427de791098c095ce31dab9333d.zip kernel_samsung_aries-7a1b29a82ba76427de791098c095ce31dab9333d.tar.gz kernel_samsung_aries-7a1b29a82ba76427de791098c095ce31dab9333d.tar.bz2 | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
arch/tile: don't validate CROSS_COMPILE needlessly
arch/tile: export only COMMAND_LINE_SIZE to userspace.
arch/tile: rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN
arch/tile: Rename the hweight() implementations to __arch_hweight()
arch/tile: extend syscall ABI to set r1 on return as well.
arch/tile: Various cleanups.
arch/tile: support backtracing on TILE-Gx
arch/tile: Fix a couple of issues with the COMPAT code for TILE-Gx.
arch/tile: Use separate, better minsec values for clocksource and sched_clock.
arch/tile: correct a bug in freeing bootmem by VA for the optional second initrd.
arch: tile: mm: pgtable.c: Removed duplicated #include
arch: tile: kernel/proc.c Removed duplicated #include
Add fanotify syscalls to <asm-generic/unistd.h>.
arch/tile: support new kunmap_atomic() naming convention.
tile: remove unused ISA_DMA_THRESHOLD define
Conflicts in arch/tile/configs/tile_defconfig (pick the mainline version
with the reduced defconfig).
Diffstat (limited to 'arch/tile/mm/fault.c')
| -rw-r--r-- | arch/tile/mm/fault.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/tile/mm/fault.c b/arch/tile/mm/fault.c index 0011f06..704f3e8 100644 --- a/arch/tile/mm/fault.c +++ b/arch/tile/mm/fault.c @@ -567,6 +567,14 @@ do_sigbus: * since that might indicate we have not yet squirreled the SPR * contents away and can thus safely take a recursive interrupt. * Accordingly, the hypervisor passes us the PC via SYSTEM_SAVE_1_2. + * + * Note that this routine is called before homecache_tlb_defer_enter(), + * which means that we can properly unlock any atomics that might + * be used there (good), but also means we must be very sensitive + * to not touch any data structures that might be located in memory + * that could migrate, as we could be entering the kernel on a dataplane + * cpu that has been deferring kernel TLB updates. This means, for + * example, that we can't migrate init_mm or its pgd. */ struct intvec_state do_page_fault_ics(struct pt_regs *regs, int fault_num, unsigned long address, |