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| author |   Arnd Bergmann <arnd@arndb.de> | 2016-03-14 23:45:12 +0100 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-03-14 19:37:03 -0400 |
| commit | e3ebd894f084255fde19116955ba7054858ff5d6 (patch) | |
| tree | fbdaf2b44466ea0597cbc94793bf29a324d25573 | |
| parent | Merge branch 'dsa-finers-bridging-control' (diff) | |
| download | linux-dev-e3ebd894f084255fde19116955ba7054858ff5d6.tar.xz linux-dev-e3ebd894f084255fde19116955ba7054858ff5d6.zip | |
smc91x: avoid self-comparison warning
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>
| -rw-r--r-- | drivers/net/ethernet/smsc/smc91x.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/ethernet/smsc/smc91x.c b/drivers/net/ethernet/smsc/smc91x.c index db7db8ac4ca3..c5ed27c54724 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 |