mips: silence 'set but not used' warnings

This patch uses 'attribute_unused' to clean up a number of warnings
messages that are generated when doing a MIPS build.  All of the
changes are in MIPS specific files and there are no code changes
other then adding the unused attribute where needed.

Signed-off-by: Steve Ellcey <sellcey@mips.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

3 files changed, 10 insertions, 10 deletions

diff --git a/libc/sysdeps/linux/mips/bits/atomic.h b/libc/sysdeps/linux/mips/bits/atomic.h
index 9a9f60f85..60ee0a6f8 100644
--- a/libc/sysdeps/linux/mips/bits/atomic.h
+++ b/libc/sysdeps/linux/mips/bits/atomic.h
@@ -135,22 +135,22 @@ typedef uintmax_t uatomic_max_t;
 /* For all "bool" routines, we return FALSE if exchange succesful.  */
 
 #define __arch_compare_and_exchange_bool_8_int(mem, new, old, rel, acq)	\
-({ __typeof (*mem) __prev; int __cmp;					\
+({ __typeof (*mem) __prev attribute_unused; int __cmp;		\
    __arch_compare_and_exchange_xxx_8_int(mem, new, old, rel, acq);	\
    !__cmp; })
 
 #define __arch_compare_and_exchange_bool_16_int(mem, new, old, rel, acq) \
-({ __typeof (*mem) __prev; int __cmp;					\
+({ __typeof (*mem) __prev attribute_unused; int __cmp;		\
    __arch_compare_and_exchange_xxx_16_int(mem, new, old, rel, acq);	\
    !__cmp; })
 
 #define __arch_compare_and_exchange_bool_32_int(mem, new, old, rel, acq) \
-({ __typeof (*mem) __prev; int __cmp;					\
+({ __typeof (*mem) __prev attribute_unused; int __cmp;		\
    __arch_compare_and_exchange_xxx_32_int(mem, new, old, rel, acq);	\
    !__cmp; })
 
 #define __arch_compare_and_exchange_bool_64_int(mem, new, old, rel, acq) \
-({ __typeof (*mem) __prev; int __cmp;					\
+({ __typeof (*mem) __prev attribute_unused; int __cmp;		\
    __arch_compare_and_exchange_xxx_64_int(mem, new, old, rel, acq);	\
    !__cmp; })
 
@@ -158,22 +158,22 @@ typedef uintmax_t uatomic_max_t;
    successful or not.  */
 
 #define __arch_compare_and_exchange_val_8_int(mem, new, old, rel, acq)	\
-({ __typeof (*mem) __prev; int __cmp;					\
+({ __typeof (*mem) __prev attribute_unused; int __cmp;		\
    __arch_compare_and_exchange_xxx_8_int(mem, new, old, rel, acq);	\
    (__typeof (*mem))__prev; })
 
 #define __arch_compare_and_exchange_val_16_int(mem, new, old, rel, acq) \
-({ __typeof (*mem) __prev; int __cmp;					\
+({ __typeof (*mem) __prev attribute_unused; int __cmp;		\
    __arch_compare_and_exchange_xxx_16_int(mem, new, old, rel, acq);	\
    (__typeof (*mem))__prev; })
 
 #define __arch_compare_and_exchange_val_32_int(mem, new, old, rel, acq) \
-({ __typeof (*mem) __prev; int __cmp;					\
+({ __typeof (*mem) __prev attribute_unused; int __cmp;		\
    __arch_compare_and_exchange_xxx_32_int(mem, new, old, rel, acq);	\
    (__typeof (*mem))__prev; })
 
 #define __arch_compare_and_exchange_val_64_int(mem, new, old, rel, acq) \
-({ __typeof (*mem) __prev; int __cmp;					\
+({ __typeof (*mem) __prev attribute_unused; int __cmp;		\
    __arch_compare_and_exchange_xxx_64_int(mem, new, old, rel, acq);	\
    (__typeof (*mem))__prev; })
 
diff --git a/libc/sysdeps/linux/mips/bits/syscalls.h b/libc/sysdeps/linux/mips/bits/syscalls.h
index 944d0382d..787bb7d55 100644
--- a/libc/sysdeps/linux/mips/bits/syscalls.h
+++ b/libc/sysdeps/linux/mips/bits/syscalls.h
@@ -29,7 +29,7 @@
        }								\
      result_var; })
 
-#define INTERNAL_SYSCALL_DECL(err) long err
+#define INTERNAL_SYSCALL_DECL(err) long err attribute_unused
 
 #define INTERNAL_SYSCALL_ERROR_P(val, err)   ((long) (err))
 
diff --git a/libc/sysdeps/linux/mips/sysdep.h b/libc/sysdeps/linux/mips/sysdep.h
index 46b6c5376..b6d4f1045 100644
--- a/libc/sysdeps/linux/mips/sysdep.h
+++ b/libc/sysdeps/linux/mips/sysdep.h
@@ -144,7 +144,7 @@ L(syse1):
      result_var; })
 
 #undef INTERNAL_SYSCALL_DECL
-#define INTERNAL_SYSCALL_DECL(err) long err
+#define INTERNAL_SYSCALL_DECL(err) long err attribute_unused
 
 #undef INTERNAL_SYSCALL_ERROR_P
 #define INTERNAL_SYSCALL_ERROR_P(val, err)   ((long) (err))