Commit ada44a04 authored May 21, 2008 by David S. Miller

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>

parent 14d2c68b

arch/sparc64/kernel/rtrap.S

+1 −0

Original line number	Diff line number	Diff line
		@@ -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