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authorDavid S. Miller <davem@davemloft.net>2008-03-26 04:51:12 -0700
committerDavid S. Miller <davem@davemloft.net>2008-03-26 04:51:12 -0700
commitf6a843d939ade435e060d580f5c56d958464f8a5 (patch)
tree4764dd4871bb032e2d0e7d5da5ef98526f9da424
parente5ac71f255335f130bbe582c4ce3008c1b46413f (diff)
[SPARC64]: flush_ptrace_access() needs preemption disable.
Based upon a report by Mariusz Kozlowski. Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--arch/sparc64/kernel/ptrace.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/ptrace.c b/arch/sparc64/kernel/ptrace.c
index bcf58ece2ba1..aaae865e7932 100644
--- a/arch/sparc64/kernel/ptrace.c
+++ b/arch/sparc64/kernel/ptrace.c
@@ -70,6 +70,8 @@ void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
if (tlb_type == hypervisor)
return;
+ preempt_disable();
+
#ifdef DCACHE_ALIASING_POSSIBLE
/* If bit 13 of the kernel address we used to access the
* user page is the same as the virtual address that page
@@ -108,6 +110,8 @@ void flush_ptrace_access(struct vm_area_struct *vma, struct page *page,
for (; start < end; start += icache_line_size)
flushi(start);
}
+
+ preempt_enable();
}
enum sparc_regset {