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mm/swap_slots.c: use conditional compilation 

For mm/swap_slots.c, use the traditional Linux method of conditional
compilation and linking instead of always compiling it by using #ifdef
CONFIG_SWAP and #endif for the entire source file (excluding header
files).

Link: http://lkml.kernel.org/r/c2a47015-0b5a-d0d9-8bc7-9984c049df20@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Tim Chen <tim.c.chen@linux.intel.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Randy Dunlap 2018-04-05 16:22:23 -07:00 committed by Linus Torvalds
parent 310253514b
commit 8e7a0c9100
2 changed files with 2 additions and 6 deletions
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4
mm/Makefile
View File

@ -37,7 +37,7 @@ obj-y := filemap.o mempool.o oom_kill.o \
readahead.o swap.o truncate.o vmscan.o shmem.o \
util.o mmzone.o vmstat.o backing-dev.o \
mm_init.o mmu_context.o percpu.o slab_common.o \
compaction.o vmacache.o swap_slots.o \
compaction.o vmacache.o \
interval_tree.o list_lru.o workingset.o \
debug.o $(mmu-y)
@ -55,7 +55,7 @@ ifdef CONFIG_MMU
endif
obj-$(CONFIG_HAVE_MEMBLOCK) += memblock.o
obj-$(CONFIG_SWAP) += page_io.o swap_state.o swapfile.o
obj-$(CONFIG_SWAP) += page_io.o swap_state.o swapfile.o swap_slots.o
obj-$(CONFIG_FRONTSWAP) += frontswap.o
obj-$(CONFIG_ZSWAP) += zswap.o
obj-$(CONFIG_HAS_DMA) += dmapool.o

4
mm/swap_slots.c
View File

@ -34,8 +34,6 @@
#include <linux/mutex.h>
#include <linux/mm.h>
#ifdef CONFIG_SWAP
static DEFINE_PER_CPU(struct swap_slots_cache, swp_slots);
static bool swap_slot_cache_active;
bool swap_slot_cache_enabled;
@ -356,5 +354,3 @@ swp_entry_t get_swap_page(struct page *page)
return entry;
}
#endif /* CONFIG_SWAP */