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| author | Masahiro Yamada <yamada.m@jp.panasonic.com> | 2014-06-12 12:26:15 +0900 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2014-06-23 15:37:24 -0600 |
| commit | 1638d98052e0d03e46d504b21ec1b88ecfcd87aa (patch) | |
| tree | 1c97382ff025ad729bfc7a160974f16be3c5c6cc /arch/sandbox | |
| parent | 9c38c070085b566e2fc3f7696cdd4362c2759285 (diff) | |
| download | u-boot-imx-1638d98052e0d03e46d504b21ec1b88ecfcd87aa.zip u-boot-imx-1638d98052e0d03e46d504b21ec1b88ecfcd87aa.tar.gz u-boot-imx-1638d98052e0d03e46d504b21ec1b88ecfcd87aa.tar.bz2 | |
sandbox: change local_irq_save() to macro
local_irq_save() should be a macro, not a function
because local_irq_save() saves flag to the given argument.
GCC is silent about this issue, but Clang warns:
In file included from lib/asm-offsets.c:15:
In file included from include/common.h:20:
In file included from include/linux/bitops.h:110:
arch/sandbox/include/asm/bitops.h:59:17:
warning: variable 'flags' is uninitialized when used here
[-Wuninitialized]
local_irq_save(flags);
^~~~~
That change causes another warning:
In file included from include/linux/bitops.h:110:0,
from include/common.h:20,
from lib/asm-offsets.c:15:
arch/sandbox/include/asm/bitops.h: In function ‘test_and_set_bit’:
arch/sandbox/include/asm/bitops.h:56:16: warning: unused variable ‘flags’ [-Wunused-variable]
So, flags should be set to __always_unused.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Jeroen Hofstee <jeroen@myspectrum.nl>
Acked-by: Simon Glass <sjg@chromium.org>
Acked-by: Jeroen Hofstee <jeroen@myspectrum.nl>
Diffstat (limited to 'arch/sandbox')
| -rw-r--r-- | arch/sandbox/include/asm/bitops.h | 5 | ||||
| -rw-r--r-- | arch/sandbox/include/asm/system.h | 5 |
2 files changed, 4 insertions, 6 deletions
diff --git a/arch/sandbox/include/asm/bitops.h b/arch/sandbox/include/asm/bitops.h index 74219c5..e807c4e 100644 --- a/arch/sandbox/include/asm/bitops.h +++ b/arch/sandbox/include/asm/bitops.h @@ -17,6 +17,7 @@ #ifndef __ASM_SANDBOX_BITOPS_H #define __ASM_SANDBOX_BITOPS_H +#include <linux/compiler.h> #include <asm/system.h> #ifdef __KERNEL__ @@ -53,7 +54,7 @@ static inline int __test_and_set_bit(int nr, void *addr) static inline int test_and_set_bit(int nr, void *addr) { - unsigned long flags; + unsigned long __always_unused flags; int out; local_irq_save(flags); @@ -75,7 +76,7 @@ static inline int __test_and_clear_bit(int nr, void *addr) static inline int test_and_clear_bit(int nr, void *addr) { - unsigned long flags; + unsigned long __always_unused flags; int out; local_irq_save(flags); diff --git a/arch/sandbox/include/asm/system.h b/arch/sandbox/include/asm/system.h index 066acc5..02beed3 100644 --- a/arch/sandbox/include/asm/system.h +++ b/arch/sandbox/include/asm/system.h @@ -8,10 +8,7 @@ #define __ASM_SANDBOX_SYSTEM_H /* Define this as nops for sandbox architecture */ -static inline void local_irq_save(unsigned flags __attribute__((unused))) -{ -} - +#define local_irq_save(x) #define local_irq_enable() #define local_irq_disable() #define local_save_flags(x) |