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>

diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index f92602e86607cb094f04ead294b8a3d6f6decdcf..27060b20678e7115463e65e508da6d863f319395 100644 (file)
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -31,6 +31,7 @@ config SPARC
 
 config SPARC32
        def_bool !64BIT
+       select GENERIC_ATOMIC64
 
 config SPARC64
        def_bool 64BIT

diff --git a/arch/sparc/include/asm/atomic_32.h b/arch/sparc/include/asm/atomic_32.h
index 03fd0c52096202559adacd7b180159832073ebef..9dd0a769fa18a8656b31f0c07838845afc46d33e 100644 (file)
--- a/arch/sparc/include/asm/atomic_32.h
+++ b/arch/sparc/include/asm/atomic_32.h
@@ -13,6 +13,8 @@
 
 #include <linux/types.h>
 
+#include <asm-generic/atomic64.h>
+
 #include <asm/system.h>
 
 #define ATOMIC_INIT(i)  { (i) }