devres: add kernel standard devm_k.alloc functions
authorJoe Perches <joe@perches.com>
Fri, 11 Oct 2013 20:11:38 +0000 (13:11 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 17 Oct 2013 01:29:07 +0000 (18:29 -0700)
commit64c862a839a8db2c02bbaa88b923d13e1208919d
tree0b3765aec1193c5040f8f840edd36876b7412dd5
parentd723a92dd465d549bf79dd481c09d59f0be02936
devres: add kernel standard devm_k.alloc functions

Currently, devm_ managed memory only supports kzalloc.

Convert the devm_kzalloc implementation to devm_kmalloc and remove the
complete memset to 0 but still set the initial struct devres header and
whatever padding before data to 0.

Add the other normal alloc variants as static inlines with __GFP_ZERO
added to the gfp flag where appropriate:

devm_kzalloc
devm_kcalloc
devm_kmalloc_array

Add gfp.h to device.h for the newly added static inlines.

akpm: the current API forces us to replace kmalloc() with kzalloc() when
performing devm_ conversions.  This adds a relatively minor overhead.
More significantly, it will defeat kmemcheck used-uninitialized checking,
and for a particular driver, losing used-uninitialised checking for their
core controlling data structures will significantly degrade kmemcheck
usefulness.

Signed-off-by: Joe Perches <joe@perches.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Sangjung Woo <sangjung.woo@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/base/devres.c
include/linux/device.h