This is continuation of development of a proposed earlier functionality to have multiple gen_pools per device, see https://lkml.org/lkml/2015/6/8/588 discussion. The main difference with the originally sent change is that instead of adding two new interfaces gen_pool_get_named() and devm_gen_pool_create_named(), it is considered better to change signatures of the existing exported functions, because devm_gen_pool_create() may be misused -- it is permitted to create several gen_pool objects assigned to the same device and gen_pool_get() returns only the first found object from device devres data due to missing devres_match helper, fortunately currently existing genalloc clients are not tainted -- at the moment the sole user of devm_gen_pool_create() is drivers/misc/sram.c. The change is split into two parts: - update gen_pool_get() and devm_gen_pool_create() interfaces on client side - implement proper handling of new gen_pool "name" argument and extend of_gen_pool_get() functionality based on it Both changes are backward compatible in sense of functionality. The lib/genalloc.c changes are based on two patches from -mm tree: - http://ozlabs.org/~akpm/mmots/broken-out/genalloc-rename-dev_get_gen_pool-to-gen_pool_get.patch - http://ozlabs.org/~akpm/mmots/broken-out/genalloc-rename-of_get_named_gen_pool-to-of_gen_pool_get.patch The client side changes are based on linux-next/master branch. Changes from v1 to v2: - addressed Andrew's valuable review comments, namely -- devm_gen_pool_create() is aware of attempts to register ambiguously addressed gen_pool objects and now it returns ERR_PTR() on error, -- memory management to store gen_pool name literal is done on genalloc side, -- replaced -1 with NUMA_NO_NODE in nid argument description, - minor updates in of_gen_pool_get() change to respect OF_DYNAMIC - instead of adding two new functions the existing functions gen_pool_get() (at91, imx5m, imx6 and CODA driver clients) and devm_gen_pool_create() (sram client) are updated. Vladimir Zapolskiy (2): genalloc: add name arg to gen_pool_get() and devm_gen_pool_create() genalloc: add support of multiple gen_pools per device arch/arm/mach-at91/pm.c | 2 +- arch/arm/mach-imx/pm-imx5.c | 2 +- arch/arm/mach-imx/pm-imx6.c | 2 +- drivers/media/platform/coda/coda-common.c | 2 +- drivers/misc/sram.c | 8 +-- include/linux/genalloc.h | 6 +- lib/genalloc.c | 99 +++++++++++++++++++++++-------- 7 files changed, 85 insertions(+), 36 deletions(-) -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
