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authorDavid S. Miller <davem@davemloft.net>2008-05-22 08:50:01 +0400
committerDavid S. Miller <davem@davemloft.net>2008-05-22 08:50:01 +0400
commitada44a0430fdd00b3f38aad0aa518e97cb760bd0 (patch)
treee06cbde666e77576a152056cf340b889f03257aa /arch
parent14d2c68baa659cfd15dc782dd229ea304330c4f6 (diff)
downloadlinux-ada44a0430fdd00b3f38aad0aa518e97cb760bd0.tar.xz
sparc64: Prevent stack backtrace false positives on trap frames.
When we fully commit to returning back to kernel mode from a trap, zero out the regs->magic value to prevent false positives during stack backtraces. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
-rw-r--r--arch/sparc64/kernel/rtrap.S1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/rtrap.S b/arch/sparc64/kernel/rtrap.S
index 3afacbb5781d..c6fc695fe1fe 100644
--- a/arch/sparc64/kernel/rtrap.S
+++ b/arch/sparc64/kernel/rtrap.S
@@ -363,6 +363,7 @@ kern_rtt: rdpr %canrestore, %g1
brz,pn %g1, kern_rtt_fill
nop
kern_rtt_restore:
+ stw %g0, [%sp + PTREGS_OFF + PT_V9_MAGIC]
restore
retry