On 09/27/2017 09:38 PM, David Miller wrote:
From: Guenter Roeck <linux@xxxxxxxxxxxx>
Date: Sun, 24 Sep 2017 10:29:31 -0700
Fix the following build error, seen when building sparc32:allmodconfig.
drivers/net/ethernet/intel/i40e/i40e_ethtool.c:
In function 'i40e_set_priv_flags':
drivers/net/ethernet/intel/i40e/i40e_ethtool.c:4150:2: error:
implicit declaration of function 'cmpxchg64'
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
That fixes the build:
@@ -72,5 +72,6 @@ __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new_, int size)
((__typeof__(*(ptr)))__cmpxchg_local_generic((ptr), (unsigned long)(o),\
(unsigned long)(n), sizeof(*(ptr))))
#define cmpxchg64_local(ptr, o, n) __cmpxchg64_local_generic((ptr), (o), (n))
+#define cmpxchg64(ptr, o, n) cmpxchg64_local((ptr), (o), (n))
#endif /* __ARCH_SPARC_CMPXCHG__ */
but it's wrong. cmpxchg64_local() is only atomic on the current cpu
so using it for plain cmpxchg64() is not going to work.
Yeah, I was concerned about that. My bad.
Unfortunately I don't know enough about sparc to provide a better solution.
Consider this a problem report, then.
Guenter
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