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

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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>
This commit is contained in:
Helge Deller 2013-03-02 20:01:05 +01:00
parent 15fb9683c3
commit 8527ed4a70
1 changed files with 2 additions and 2 deletions
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4
arch/parisc/include/asm/atomic.h
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@ -115,8 +115,8 @@ 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_add(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))))