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cxgb: avoid open-coded offsetof()

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clang-14 does not like the custom offsetof() macro in vsc7326:

drivers/net/ethernet/chelsio/cxgb/vsc7326.c:597:3: error: performing pointer subtraction with a null pointer has undefined behavior [-Werror,-Wnull-pointer-subtraction]
                HW_STAT(RxUnicast, RxUnicastFramesOK),
                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/chelsio/cxgb/vsc7326.c:594:56: note: expanded from macro 'HW_STAT'
        { reg, (&((struct cmac_statistics *)NULL)->stat_name) - (u64 *)NULL }

Rewrite this to use the version provided by the kernel.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2021-09-27 14:16:04 +02:00 committed by David S. Miller
parent 3e0d5699a9
commit ef5d6356e2
1 changed files with 1 additions and 1 deletions
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drivers/net/ethernet/chelsio/cxgb/vsc7326.c
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@ -591,7 +591,7 @@ static void port_stats_update(struct cmac *mac)
} hw_stats[] = {
#define HW_STAT(reg, stat_name) \
{ reg, (&((struct cmac_statistics *)NULL)->stat_name) - (u64 *)NULL }
{ reg, offsetof(struct cmac_statistics, stat_name) / sizeof(u64) }
/* Rx stats */
HW_STAT(RxUnicast, RxUnicastFramesOK),