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Subject[PATCH 04/21] powerpc: Mark both tmp variables as unused
Since the value of `tmp` is never intended to be read, declare both `tmp`
variables as unused. Fix warning (treated as error in W=1):

CC arch/powerpc/kernel/signal_32.o
arch/powerpc/kernel/signal_32.c: In function ‘sys_swapcontext’:
arch/powerpc/kernel/signal_32.c:1048:16: error: variable ‘tmp’ set but not used [-Werror=unused-but-set-variable]
unsigned char tmp;
arch/powerpc/kernel/signal_32.c: In function ‘sys_debug_setcontext’:
arch/powerpc/kernel/signal_32.c:1234:16: error: variable ‘tmp’ set but not used [-Werror=unused-but-set-variable]
unsigned char tmp;
cc1: all warnings being treated as errors

Signed-off-by: Mathieu Malaterre <>
arch/powerpc/kernel/signal_32.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index a46de0035214..492f03451877 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -1045,7 +1045,7 @@ long sys_swapcontext(struct ucontext __user *old_ctx,
struct ucontext __user *new_ctx,
int ctx_size, int r6, int r7, int r8, struct pt_regs *regs)
- unsigned char tmp;
+ unsigned char tmp __maybe_unused;
int ctx_has_vsx_region = 0;

#ifdef CONFIG_PPC64
@@ -1231,7 +1231,7 @@ int sys_debug_setcontext(struct ucontext __user *ctx,
struct sig_dbg_op op;
int i;
- unsigned char tmp;
+ unsigned char tmp __maybe_unused;
unsigned long new_msr = regs->msr;
unsigned long new_dbcr0 = current->thread.debug.dbcr0;
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