Commit 4b9f0187 authored Dec 20, 2019 by Helge Deller Committed by Greg Kroah-Hartman Jan 12, 2020

parisc: Fix compiler warnings in debug_core.c



[ Upstream commit 75cf9797006a3a9f29a3a25c1febd6842a4a9eb2 ]

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>

parent e80e36de

arch/parisc/include/asm/cmpxchg.h

+8 −2

Original line number	Diff line number	Diff line
		@@ -45,7 +45,13 @@ __xchg(unsigned long x, __volatile__ void *ptr, int size)
		** return __ldcw(p);
		*/
		#define xchg(ptr, x) \
		((__typeof__((ptr)))__xchg((unsigned long)(x), (ptr), sizeof((ptr))))
		({ \
		__typeof__(*(ptr)) __ret; \
		__typeof__(*(ptr)) _x_ = (x); \
		__ret = (__typeof__(*(ptr))) \
		__xchg((unsigned long)_x_, (ptr), sizeof(*(ptr))); \
		__ret; \
		})

		/* bug catcher for when unsupported size is used - won't link */
		extern void __cmpxchg_called_with_bad_pointer(void);