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authorArnd Bergmann <arnd@arndb.de>2016-03-14 23:45:12 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-11-10 16:36:36 +0100
commitc5b2cd97b1d3f1e160d6e0f45cbc9da04d0336a9 (patch)
tree373da932a54aa7d26f2f4c170ade1518afb088f5 /drivers/net
parent603c78000f8c9e813f9399619c97be105c820585 (diff)
smc91x: avoid self-comparison warning
commit e3ebd894f084255fde19116955ba7054858ff5d6 upstream. The smc91x driver defines a macro that compares its argument to itself, apparently to get a true result while using its argument to avoid a warning about unused local variables. Unfortunately, this triggers a warning with gcc-6, as the comparison is obviously useless: drivers/net/ethernet/smsc/smc91x.c: In function 'smc_hardware_send_pkt': drivers/net/ethernet/smsc/smc91x.c:563:14: error: self-comparison always evaluates to true [-Werror=tautological-compare] if (!smc_special_trylock(&lp->lock, flags)) { This replaces the macro with another one that behaves similarly, with a cast to (void) to ensure the argument is used, and using a literal 'true' as its value. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/smsc/smc91x.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/smsc/smc91x.c b/drivers/net/ethernet/smsc/smc91x.c
index 8c44cf6ff7a2..23a038810083 100644
--- a/drivers/net/ethernet/smsc/smc91x.c
+++ b/drivers/net/ethernet/smsc/smc91x.c
@@ -540,7 +540,7 @@ static inline void smc_rcv(struct net_device *dev)
#define smc_special_lock(lock, flags) spin_lock_irqsave(lock, flags)
#define smc_special_unlock(lock, flags) spin_unlock_irqrestore(lock, flags)
#else
-#define smc_special_trylock(lock, flags) (flags == flags)
+#define smc_special_trylock(lock, flags) ((void)flags, true)
#define smc_special_lock(lock, flags) do { flags = 0; } while (0)
#define smc_special_unlock(lock, flags) do { flags = 0; } while (0)
#endif