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parisc: avoid a warning on u8 cast for cmpxchg on u8 pointers

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commit b344d6a83d ("parisc: add support for cmpxchg on u8 pointers")
can generate a sparse warning ("cast truncates bits from constant
value"), which has been reported several times [1] [2] [3].

The original code worked as expected, but anyway, let silence such
sparse warning as what others did [4].

[1] https://lore.kernel.org/r/[email protected]
[2] https://lore.kernel.org/r/[email protected]
[3] https://lore.kernel.org/r/202008210829.KVwn7Xeh%[email protected]
[4] https://lore.kernel.org/r/[email protected]
Cc: Liam Beguin <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: [email protected] # v5.8+
Signed-off-by: Gao Xiang <[email protected]>
Signed-off-by: Helge Deller <[email protected]>
This commit is contained in:
Gao Xiang
2021-04-06 14:32:12 +02:00
committed by Helge Deller
parent 9054284e88
commit 4d752e5af6
1 changed files with 1 additions and 1 deletions
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arch/parisc/include/asm/cmpxchg.h
+1 -1
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@@ -72,7 +72,7 @@ __cmpxchg(volatile void *ptr, unsigned long old, unsigned long new_, int size)
#endif
case 4: return __cmpxchg_u32((unsigned int *)ptr,
(unsigned int)old, (unsigned int)new_);
case 1: return __cmpxchg_u8((u8 *)ptr, (u8)old, (u8)new_);
case 1: return __cmpxchg_u8((u8 *)ptr, old & 0xff, new_ & 0xff);
}
__cmpxchg_called_with_bad_pointer();
return old;