parisc: Fix compiler warnings in debug_core.c
[ Upstream commit 75cf979700
]
Fix this compiler warning:
kernel/debug/debug_core.c: In function ‘kgdb_cpu_enter’:
arch/parisc/include/asm/cmpxchg.h:48:3: warning: value computed is not used [-Wunused-value]
48 | ((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
arch/parisc/include/asm/atomic.h:78:30: note: in expansion of macro ‘xchg’
78 | #define atomic_xchg(v, new) (xchg(&((v)->counter), new))
| ^~~~
kernel/debug/debug_core.c:596:4: note: in expansion of macro ‘atomic_xchg’
596 | atomic_xchg(&kgdb_active, cpu);
| ^~~~~~~~~~~
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -44,8 +44,14 @@ __xchg(unsigned long x, __volatile__ void *ptr, int size)
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** if (((unsigned long)p & 0xf) == 0)
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** return __ldcw(p);
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*/
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#define xchg(ptr, x) \
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((__typeof__(*(ptr)))__xchg((unsigned long)(x), (ptr), sizeof(*(ptr))))
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#define xchg(ptr, x) \
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({ \
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__typeof__(*(ptr)) __ret; \
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__typeof__(*(ptr)) _x_ = (x); \
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__ret = (__typeof__(*(ptr))) \
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__xchg((unsigned long)_x_, (ptr), sizeof(*(ptr))); \
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__ret; \
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})
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/* bug catcher for when unsupported size is used - won't link */
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extern void __cmpxchg_called_with_bad_pointer(void);
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