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sparc32: support atomic64_t 

There is no-one that really require atomic64_t support on sparc32.
But several drivers fails to build without proper atomic64 support.
And for an allyesconfig build for sparc32 this is annoying.

Include the generic atomic64_t support for sparc32.
This has a text footprint cost:

$size vmlinux (before atomic64_t support)
   text    data     bss     dec     hex filename
3578860  134260  108781 3821901  3a514d vmlinux

$size vmlinux (after atomic64_t support)
   text    data     bss     dec     hex filename
3579892  130684  108781 3819357  3a475d vmlinux

text increase (3579892 - 3578860) = 1032 bytes

data decreases - but I fail to explain why!
I have rebuild twice to check my numbers.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Sam Ravnborg 2011-12-27 21:46:53 +01:00 committed by David S. Miller
parent ab17da5cb9
commit aea1181b0b
2 changed files with 3 additions and 0 deletions
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1
arch/sparc/Kconfig
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@ -31,6 +31,7 @@ config SPARC
config SPARC32
def_bool !64BIT
select GENERIC_ATOMIC64
config SPARC64
def_bool 64BIT

2
arch/sparc/include/asm/atomic_32.h
View File

@ -13,6 +13,8 @@
#include <linux/types.h>
#include <asm-generic/atomic64.h>
#include <asm/system.h>
#define ATOMIC_INIT(i) { (i) }