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linux/arch/powerpc
Jeremy Kerr 606572634c powerpc/spufs: Fix spinning in spufs_ps_fault on signal
Currently, we can end up in an infinite loop if we get a signal
while the kernel has faulted in spufs_ps_fault. Eg:

 alarm(1);

 write(fd, some_spu_psmap_register_address, 4);

- the write's copy_from_user will fault on the ps mapping, and
signal_pending will be non-zero. Because returning from the fault
handler will never clear TIF_SIGPENDING, so we'll just keep faulting,
resulting in an unkillable process using 100% of CPU.

This change returns VM_FAULT_SIGBUS if there's a fatal signal pending,
letting us escape the loop.

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
2008-11-21 10:14:16 +11:00
..
boot Merge commit 'origin' 2008-10-15 11:31:54 +11:00
configs powerpc: disable CHRP and PMAC support in various defconfigs 2008-10-13 11:09:59 -05:00
include/asm Merge commit 'origin' 2008-10-15 11:31:54 +11:00
kernel Merge commit 'origin' 2008-10-15 11:31:54 +11:00
kvm KVM: ppc: fix invalidation of large guest pages 2008-07-27 12:02:05 +03:00
lib powerpc: Fix DMA offset for non-coherent DMA 2008-10-14 10:35:26 +11:00
math-emu powerpc/math-emu: Use kernel generic math-emu code 2008-10-01 08:40:07 -05:00
mm powerpc: Get USE_STRICT_MM_TYPECHECKS working again 2008-10-14 10:35:27 +11:00
oprofile powerpc/cell/oprofile: Fix test on overlay_tbl_offset in vma_map 2008-10-10 15:55:18 +11:00
platforms powerpc/spufs: Fix spinning in spufs_ps_fault on signal 2008-11-21 10:14:16 +11:00
sysdev Merge commit 'origin' 2008-10-15 11:31:54 +11:00
xmon Merge branch 'linux-2.6' 2008-06-30 10:16:50 +10:00
Kconfig powerpc: Enforce sane MAX_ORDER 2008-10-07 14:26:20 +11:00
Kconfig.debug powerpc: Split-out common MSI bitmap logic into msi_bitmap.c 2008-08-20 16:34:57 +10:00
Makefile powerpc: Enforce a non-spe kernel build even on broken compilers 2008-09-15 11:08:41 -07:00