lib/scatterlist: Introduce and export __sg_alloc_table_from_pages
authorTvrtko Ursulin <tvrtko.ursulin@intel.com>
Thu, 3 Aug 2017 09:13:51 +0000 (10:13 +0100)
committerTvrtko Ursulin <tvrtko.ursulin@intel.com>
Thu, 7 Sep 2017 09:48:29 +0000 (10:48 +0100)
commit89d8589cd72c6f48b19c370517d16f3ee23909df
tree6b00e8b0121a55b72dc9098a412395cf99692575
parentc125906b839b794c580a5de911de65bd2c63aaee
lib/scatterlist: Introduce and export __sg_alloc_table_from_pages

Drivers like i915 benefit from being able to control the maxium
size of the sg coalesced segment while building the scatter-
gather list.

Introduce and export the __sg_alloc_table_from_pages function
which will allow it that control.

v2: Reorder parameters. (Chris Wilson)
v3: Fix incomplete reordering in v2.
v4: max_segment needs to be page aligned.
v5: Rebase.
v6: Rebase.
v7: Fix spelling in commit and mention max segment size in
    __sg_alloc_table_from_pages kerneldoc. (Andrew Morton)

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-kernel@vger.kernel.org
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20170803091351.23594-1-tvrtko.ursulin@linux.intel.com
include/linux/scatterlist.h
lib/scatterlist.c