This is a note to let you know that I've just added the patch titled
sparc32: support atomic64_t
to the 3.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
sparc32-support-atomic64_t.patch
and it can be found in the queue-3.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From aea1181b0bd0a09c54546399768f359d1e198e45 Mon Sep 17 00:00:00 2001
From: Sam Ravnborg <[email protected]>
Date: Tue, 27 Dec 2011 21:46:53 +0100
Subject: sparc32: support atomic64_t
From: Sam Ravnborg <[email protected]>
commit aea1181b0bd0a09c54546399768f359d1e198e45 upstream, 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 <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Andreas Larsson <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
arch/sparc/Kconfig | 1 +
arch/sparc/include/asm/atomic_32.h | 2 ++
2 files changed, 3 insertions(+)
--- 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
--- 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) }
Patches currently in stable-queue which might be from [email protected] are
queue-3.0/sparc32-support-atomic64_t.patch
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