mm/swap_slots.c: assign|reset cache slot by value directly
Currently we use a tmp pointer, pentry, to transfer and reset swap cache slot, which is a little redundant. Swap cache slot stores the entry value directly, assign and reset it by value would be straight forward. Also this patch merges the else and if, since this is the only case we refill and repeat swap cache. Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Tim Chen <tim.c.chen@linux.intel.com> Link: http://lkml.kernel.org/r/20200311055352.50574-1-richard.weiyang@linux.alibaba.comSigned-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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