Commit 8527ed4a authored Mar 02, 2013 by Helge Deller

parisc: fix compile warnings triggered by atomic_sub(sizeof(),v)



This fixes compile warnings like this one:
net/ipv4/igmp.c: In function ‘ip_mc_leave_group’:
net/ipv4/igmp.c:1898:3: warning: overflow in implicit constant conversion [-Woverflow]

atomic_sub() is defined as __atomic_add_return(-(VAL),(v))))
and if VAL is of type unsigned int (as returned by sizeof()), negating
this value will overflow. Fix this by type-casting VAL to int type.

Signed-off-by: Helge Deller <deller@gmx.de>

parent 15fb9683

arch/parisc/include/asm/atomic.h

+2 −2

Original line number	Diff line number	Diff line
		@@ -116,7 +116,7 @@ static __inline__ int __atomic_add_unless(atomic_t *v, int a, int u)


		#define atomic_add(i,v) ((void)(__atomic_add_return( (i),(v))))
		#define atomic_sub(i,v) ((void)(__atomic_add_return(-(i),(v))))
		#define atomic_sub(i,v) ((void)(__atomic_add_return(-((int) (i)),(v))))
		#define atomic_inc(v) ((void)(__atomic_add_return( 1,(v))))
		#define atomic_dec(v) ((void)(__atomic_add_return( -1,(v))))