[PATCH] arm64: fix invocation of restore_altstack

Mark Rutland mark.rutland at arm.com
Thu Feb 14 08:35:52 EST 2013


I noticed the following issue while attempting to build an arm64 kernel from
next-20130214, and it still seems to be present in signal/for-next and

It looks to be a trivial typo.


Since e6d056c7c0: "arm64: switch to generic sigaltstack", arm64 won't

arch/arm64/kernel/signal.c: In function ‘sys_rt_sigreturn’:
arch/arm64/kernel/signal.c:152:2: error: incompatible type for argument 1 of ‘restore_altstack’
In file included from arch/arm64/kernel/signal.c:21:0:
include/linux/signal.h:434:5: note: expected ‘const struct stack_t *’ but argument is of type ‘stack_t’
make[1]: *** [arch/arm64/kernel/signal.o] Error 1
make: *** [arch/arm64/kernel] Error 2

This patch fixes up the call to restore_altstack to pass the correct

Signed-off-by: Mark Rutland <mark.rutland at arm.com>
 arch/arm64/kernel/signal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c
index d60ad23..890a591 100644
--- a/arch/arm64/kernel/signal.c
+++ b/arch/arm64/kernel/signal.c
@@ -149,7 +149,7 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
 	if (restore_sigframe(regs, frame))
 		goto badframe;
-	if (restore_altstack(frame->uc.uc_stack))
+	if (restore_altstack(&frame->uc.uc_stack))
 		goto badframe;
 	return regs->regs[0];

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