From: Matthew Wilcox <matthew@wil.cx>
Date: Fri, 14 Mar 2008 18:35:22 +0000 (-0400)
Subject: Simplify semaphore implementation
X-Git-Tag: v2.6.26-rc1~1155^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b17170b2fac96705db3188f093f89e8e838418e4;p=pandora-kernel.git

Simplify semaphore implementation

By removing the negative values of 'count' and relying on the wait_list to
indicate whether we have any waiters, we can simplify the implementation
by removing the protection against an unlikely race condition.  Thanks to
David Howells for his suggestions.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
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