Hi all, After merging the net-next tree, today's linux-next build (sparc64 defconfig) produced these warnings:
In file included from arch/sparc/include/asm/cmpxchg.h:4:0,
from arch/sparc/include/asm/atomic_64.h:11,
from arch/sparc/include/asm/atomic.h:4,
from include/linux/atomic.h:4,
from include/linux/spinlock.h:416,
from include/linux/mmzone.h:7,
from include/linux/gfp.h:5,
from include/linux/mm.h:9,
from net/packet/af_packet.c:56:
net/packet/af_packet.c: In function 'packet_rcv_has_room':
arch/sparc/include/asm/cmpxchg_64.h:43:22: warning: value computed is not used
[-Wunused-value]
#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned
long)(x),(ptr),sizeof(*(ptr))))
^
net/packet/af_packet.c:1314:3: note: in expansion of macro 'xchg'
xchg(&po->pressure, !has_room);
^
net/packet/af_packet.c: In function 'packet_poll':
arch/sparc/include/asm/cmpxchg_64.h:43:22: warning: value computed is not used
[-Wunused-value]
#define xchg(ptr,x) ((__typeof__(*(ptr)))__xchg((unsigned
long)(x),(ptr),sizeof(*(ptr))))
^
net/packet/af_packet.c:3817:3: note: in expansion of macro 'xchg'
xchg(&po->pressure, 0);
^
Introduced by commit 2ccdbaa6d55b ("packet: rollover lock contention
avoidance").
--
Cheers,
Stephen Rothwell [email protected]
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