Commit aea1181b0bd0a09c54546399768f359d1e198e45 upstream
[Backport to 3.0.y. Needed to compile ext4 for sparc32 since commit
503f4bdcc078e7abee273a85ce322de81b18a224]
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@xxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Andreas Larsson <andreas@xxxxxxxxxxx>
---
If this is an incorrect way to submit a backport of someone elses patch
to stable, please let me know. The Signed-off-by from Sam and David are
for the upstream patch.
arch/sparc/Kconfig | 1 +
arch/sparc/include/asm/atomic_32.h | 2 ++
2 files changed, 3 insertions(+)
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 2a68b34..113a6f9 100644
--- 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 7ae128b..98f223a 100644
--- a/arch/sparc/include/asm/atomic_32.h
+++ b/arch/sparc/include/asm/atomic_32.h
@@ -15,6 +15,8 @@
#ifdef __KERNEL__
+#include <asm-generic/atomic64.h>
+
#include <asm/system.h>
#define ATOMIC_INIT(i) { (i) }
--
1.7.10.4
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