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MIPS: Fix GCC-4.6 'set but not used' warning in signal*.c

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GCC-4.6 can find more unused code than previous versions could.

In the case of protected_restore_fp_context{,32}, the variable tmp is
really used.  Its use is tricky in that we really care about the side
effects of the __put_user() calls.  So we must mark tmp with
__maybe_unused to quiet the warning.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2035/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
David Daney 2011-01-24 14:51:34 -08:00 committed by Ralf Baechle
parent a18059ace1
commit c726b82213
2 changed files with 2 additions and 2 deletions
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2
arch/mips/kernel/signal.c
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@ -84,7 +84,7 @@ static int protected_save_fp_context(struct sigcontext __user *sc)
static int protected_restore_fp_context(struct sigcontext __user *sc)
{
int err, tmp;
int err, tmp __maybe_unused;
while (1) {
lock_fpu_owner();
own_fpu_inatomic(0);

2
arch/mips/kernel/signal32.c
View file

@ -115,7 +115,7 @@ static int protected_save_fp_context32(struct sigcontext32 __user *sc)
static int protected_restore_fp_context32(struct sigcontext32 __user *sc)
{
int err, tmp;
int err, tmp __maybe_unused;
while (1) {
lock_fpu_owner();
own_fpu_inatomic(0);