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| author |   Atsushi Nemoto <anemo@mba.ocn.ne.jp> | 2006-08-25 17:55:31 +0900 |
|---|---|---|
| committer |   Ralf Baechle <ralf@linux-mips.org> | 2006-09-27 13:37:37 +0100 |
| commit | f6502791d780b22fc147150137704a07a05ba361 (patch) | |
| tree | 687dbfcd20e60c480868eb1b64f784e8084b6e4b /arch/mips/mm/c-r4k.c | |
| parent | [MIPS] MT: Fix setting of XTC. (diff) | |
| download | linux-dev-f6502791d780b22fc147150137704a07a05ba361.tar.xz linux-dev-f6502791d780b22fc147150137704a07a05ba361.zip | |
[MIPS] Do not use drop_mmu_context to flusing other task's VIPT I-cache.
c-r4k.c and c-sb1.c use drop_mmu_context() to flush virtually tagged
I-caches, but this does not work for flushing other task's icache. This
is for example triggered by copy_to_user_page() called from ptrace(2).
Use indexed flush for such cases.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/mm/c-r4k.c')
| -rw-r--r-- | arch/mips/mm/c-r4k.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c index 4e1498246343..2d729f6f6348 100644 --- a/arch/mips/mm/c-r4k.c +++ b/arch/mips/mm/c-r4k.c @@ -475,7 +475,7 @@ static inline void local_r4k_flush_cache_page(void *args) } } if (exec) { - if (cpu_has_vtag_icache) { + if (cpu_has_vtag_icache && mm == current->active_mm) { int cpu = smp_processor_id(); if (cpu_context(cpu, mm) != 0) @@ -599,7 +599,7 @@ static inline void local_r4k_flush_icache_page(void *args) * We're not sure of the virtual address(es) involved here, so * we have to flush the entire I-cache. */ - if (cpu_has_vtag_icache) { + if (cpu_has_vtag_icache && vma->vm_mm == current->active_mm) { int cpu = smp_processor_id(); if (cpu_context(cpu, vma->vm_mm) != 0) |