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sparc64: Prevent stack backtrace false positives on trap frames.

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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>
This commit is contained in:
David S. Miller 2008-05-21 21:50:01 -07:00
parent 14d2c68baa
commit ada44a0430
1 changed files with 1 additions and 0 deletions
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arch/sparc64/kernel/rtrap.S
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@ -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