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authorAtsushi Nemoto <anemo@mba.ocn.ne.jp>2006-08-25 17:55:31 +0900
committerRalf Baechle <ralf@linux-mips.org>2006-09-27 13:37:37 +0100
commitf6502791d780b22fc147150137704a07a05ba361 (patch)
tree687dbfcd20e60c480868eb1b64f784e8084b6e4b /arch/mips/mm/c-r4k.c
parenta94d702049569401c65b579d0751ce282f962b41 (diff)
[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.c4
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)