From: Eric Sandeen <sandeen@redhat.com>
Date: Tue, 8 Jul 2008 15:27:34 -0500
Subject: [fs] noinline_for_stack attribute
Message-id: 4873CDB6.8000608@redhat.com
O-Subject: [PATCH RHEL5 7/9] noinline_for_stack attribute
Bugzilla: 443896
RH-Acked-by: Jeff Moyer <jmoyer@redhat.com>
RH-Acked-by: Jeff Layton <jlayton@redhat.com>
RH-Acked-by: Alexander Viro <aviro@redhat.com>

This is for:

Bugzilla Bug 443896: RFE: [Ext4 enabler] backport vfs
helpers to facilitate ext4 backport and testing

From: Andrew Morton <akpm@linux-foundation.org>
Date: Tue, 4 Mar 2008 22:28:40 +0000 (-0800)
Subject: add noinline_for_stack
X-Git-Tag: v2.6.25-rc4~70
X-Git-Url: http://git.engineering.redhat.com/?p=linux-2.6.git;a=commitdiff_plain;h=735c4fb916e9f83a9350aeb2680d77d01ea75094

add noinline_for_stack

People are adding `noinline' in various places to prevent excess stack
consumption due to gcc inlining.  But once this is done, it is quite unobvious
why the `noinline' is present in the code.  We can comment each and every
site, or we can use noinline_for_stack.

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 78e57bb..f48079c 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -132,6 +132,12 @@ extern void __chk_io_ptr(void __iomem *);
 #define noinline
 #endif
 
+/*
+ * Rather then using noinline to prevent stack consumption, use
+ * noinline_for_stack instead.  For documentaiton reasons.
+ */
+#define noinline_for_stack noinline
+
 #ifndef __always_inline
 #define __always_inline inline
 #endif