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authorRiku Voipio <riku.voipio@linaro.org>2014-04-22 15:40:50 +0300
committerRiku Voipio <riku.voipio@linaro.org>2014-06-09 14:13:22 +0300
commitcbcec6d47949cba5d57e02d3c18b51a744a9e6ca (patch)
tree0365b955635d958862028ef413087af78aca5560
parentc4ce217a36dc27384b2f3c4ee7e67961d32353db (diff)
downloadqemu-getputcleanup.tar.gz
linux-user: fix gcc-4.9 compiler error on __{get,put]}_usergetputcleanup
gcc-4.9 finds unused operand: linux-user/syscall.c: In function ‘host_to_target_stat64’: linux-user/qemu.h:301:19: error: right-hand operand of comma expression has no effect [-Werror=unused-value] ((hptr), (x)), 0) Just removing the rh operand is no good, it will error in later: linux-user/main.c: In function ‘arm_kernel_cmpxchg64_helper’: linux-user/qemu.h:330:15: error: void value not ignored as it ought to be __ret = __put_user((x), __hptr); \ Thus, remove setting __ret from __get_user and __put_user, as and set the right hand operand to (void)0 to make it clear that these return never nothing. This commit depends on the signal.c cleanup, to ensure bisectable version history. Signed-off-by: Riku Voipio <riku.voipio@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Cc: Richard Henderson <rth@twiddle.net>
-rw-r--r--linux-user/qemu.h12
1 files changed, 6 insertions, 6 deletions
diff --git a/linux-user/qemu.h b/linux-user/qemu.h
index ba3d8ab378..8012cc2f5b 100644
--- a/linux-user/qemu.h
+++ b/linux-user/qemu.h
@@ -299,7 +299,7 @@ static inline int access_ok(int type, abi_ulong addr, abi_ulong size)
__builtin_choose_expr(sizeof(*(hptr)) == 2, stw_##e##_p, \
__builtin_choose_expr(sizeof(*(hptr)) == 4, stl_##e##_p, \
__builtin_choose_expr(sizeof(*(hptr)) == 8, stq_##e##_p, abort)))) \
- ((hptr), (x)), 0)
+ ((hptr), (x)), (void)0)
#define __get_user_e(x, hptr, e) \
((x) = (typeof(*hptr))( \
@@ -307,7 +307,7 @@ static inline int access_ok(int type, abi_ulong addr, abi_ulong size)
__builtin_choose_expr(sizeof(*(hptr)) == 2, lduw_##e##_p, \
__builtin_choose_expr(sizeof(*(hptr)) == 4, ldl_##e##_p, \
__builtin_choose_expr(sizeof(*(hptr)) == 8, ldq_##e##_p, abort)))) \
- (hptr)), 0)
+ (hptr)), (void)0)
#ifdef TARGET_WORDS_BIGENDIAN
# define __put_user(x, hptr) __put_user_e(x, hptr, be)
@@ -326,9 +326,9 @@ static inline int access_ok(int type, abi_ulong addr, abi_ulong size)
({ \
abi_ulong __gaddr = (gaddr); \
target_type *__hptr; \
- abi_long __ret; \
+ abi_long __ret = 0; \
if ((__hptr = lock_user(VERIFY_WRITE, __gaddr, sizeof(target_type), 0))) { \
- __ret = __put_user((x), __hptr); \
+ __put_user((x), __hptr); \
unlock_user(__hptr, __gaddr, sizeof(target_type)); \
} else \
__ret = -TARGET_EFAULT; \
@@ -339,9 +339,9 @@ static inline int access_ok(int type, abi_ulong addr, abi_ulong size)
({ \
abi_ulong __gaddr = (gaddr); \
target_type *__hptr; \
- abi_long __ret; \
+ abi_long __ret = 0; \
if ((__hptr = lock_user(VERIFY_READ, __gaddr, sizeof(target_type), 1))) { \
- __ret = __get_user((x), __hptr); \
+ __get_user((x), __hptr); \
unlock_user(__hptr, __gaddr, 0); \
} else { \
/* avoid warning */ \