[GIT PULL for-4.4 16/25] slub: do not merge cache if slub_debug contains a never-merge flag

From: Grygorii Maistrenko [ Upstream commit c6e28895a4372992961888ffaadc9efc643b5bfe ] In case CONFIG_SLUB_DEBUG_ON=n, find_mergeable() gets debug features from commandline but never checks if there are features from the SLAB_NEVER_MERGE set. As a result selected by

[GIT PULL for-4.4 16/25] slub: do not merge cache if slub_debug contains a never-merge flag

From: Grygorii Maistrenko [ Upstream commit c6e28895a4372992961888ffaadc9efc643b5bfe ] In case CONFIG_SLUB_DEBUG_ON=n, find_mergeable() gets debug features from commandline but never checks if there are features from the SLAB_NEVER_MERGE set. As a result selected by slub_debug caches are