From: David S. Miller <davem@davemloft.net>
Date: Thu, 8 Sep 2005 21:37:53 +0000 (-0700)
Subject: [SPARC64]: Inline membar()'s again.
X-Git-Tag: v2.6.14-rc1~492^2~21^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4d803fcdcd97dd346d4b39c3b76e5879cead8a31;p=pandora-kernel.git

[SPARC64]: Inline membar()'s again.

Since GCC has to emit a call and a delay slot to the
out-of-line "membar" routines in arch/sparc64/lib/mb.S
it is much better to just do the necessary predicted
branch inline instead as:

	ba,pt	%xcc, 1f
	 membar	#whatever
1:

instead of the current:

	call	membar_foo
	 dslot

because this way GCC is not required to allocate a stack
frame if the function can be a leaf function.

This also makes this bug fix easier to backport to 2.4.x

Signed-off-by: David S. Miller <davem@davemloft.net>
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