lib/scatterlist: Introduce sgl_alloc() and sgl_free()

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Many kernel drivers contain code that allocates and frees both a
scatterlist and the pages that populate that scatterlist.
Introduce functions in lib/scatterlist.c that perform these tasks
instead of duplicating this functionality in multiple drivers.
Only include these functions in the build if CONFIG_SGL_ALLOC=y
to avoid that the kernel size increases if this functionality is
not used.

Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Bart Van Assche 2018-01-05 08:26:46 -08:00 • committed by Jens Axboe

parent bbbc3c1cfa

commit e80a0af475

3 changed files with 119 additions and 0 deletions

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10

include/linux/scatterlist.h

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4

lib/Kconfig

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105

lib/scatterlist.c

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