From: Christoph Lameter <cl@linux.com>
Date: Wed, 5 Sep 2012 00:20:33 +0000 (+0000)
Subject: mm/slab_common: Improve error handling in kmem_cache_create
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~8^2~1^2~14
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=686d550d222e8f83f6e709debbedf9d8ef77aec7;p=pandora-kernel.git

mm/slab_common: Improve error handling in kmem_cache_create

Instead of using s == NULL use an errorcode. This allows much more
detailed diagnostics as to what went wrong. As we add more functionality
from the slab allocators to the common kmem_cache_create() function we will
also add more error conditions.

Print the error code during the panic as well as in a warning if the module
can handle failure. The API for kmem_cache_create() currently does not allow
the returning of an error code. Return NULL but log the cause of the problem
in the syslog.

Reviewed-by: Glauber Costa <glommer@parallels.com>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
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