| Date | Wed, 16 Apr 2008 18:02:07 -0700 | From | Chris Wright <> | Subject | SPARC64: flush_ptrace_access() needs preemption disable. |
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-stable review patch. If anyone has any objections, please let us know. ---------------------
From: David S. Miller <davem@davemloft.net>
Upstream commit: f6a843d939ade435e060d580f5c56d958464f8a5
Based upon a report by Mariusz Kozlowski.
Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Chris Wright <chrisw@sous-sol.org> --- arch/sparc64/kernel/ptrace.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/arch/sparc64/kernel/ptrace.c +++ b/arch/sparc64/kernel/ptrace.c @@ -127,6 +127,8 @@ void flush_ptrace_access(struct vm_area_ 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 @@ -165,6 +167,8 @@ void flush_ptrace_access(struct vm_area_ for (; start < end; start += icache_line_size) flushi(start); } + + preempt_enable(); } asmlinkage void do_ptrace(struct pt_regs *regs) --
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