From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri, 13 May 2011 18:51:01 +0000 (-0700)
Subject: vfs: micro-optimize acl_permission_check()
X-Git-Tag: v2.6.39~31
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=26cf46be954a2dd391d32eeaf7d07c3a953dcc5a;p=pandora-kernel.git

vfs: micro-optimize acl_permission_check()

It's a hot function, and we're better off not mixing types in the mask
calculations.  The compiler just ends up mixing 16-bit and 32-bit
operations, for no good reason.

So do everything in 'unsigned int' rather than mixing 'unsigned int'
masking with a 'umode_t' (16-bit) mode variable.

This, together with the parent commit (47a150edc2ae: "Cache user_ns in
struct cred") makes acl_permission_check() much nicer.

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