diff options
| author | Huang Ying <[email protected]> | 2018-08-21 21:52:13 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2018-08-22 10:52:43 -0700 |
| commit | 33ee011e5656edef6a58952006c486d342b7bbb5 (patch) | |
| tree | 414b1eb942eb563224866694da7290c02f097be4 | |
| parent | afa4711ef1399beb60964dcb2cd0369dfb0ac20a (diff) | |
mm/swapfile.c: unify normal/huge code path in swap_page_trans_huge_swapped()
As suggested by Dave, we should unify the code path for normal and huge
swap support if possible to avoid duplicated code, bugs, etc. and make
it easier to review code.
In this patch, the normal/huge code path in
swap_page_trans_huge_swapped() is unified, the added and removed lines
are same. And the binary size is kept almost same when
CONFIG_TRANSPARENT_HUGEPAGE=n.
text data bss dec hex filename
base: 24179 2028 340 26547 67b3 mm/swapfile.o
unified: 24215 2028 340 26583 67d7 mm/swapfile.o
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: "Huang, Ying" <[email protected]>
Suggested-and-acked-by: Dave Hansen <[email protected]>
Reviewed-by: Daniel Jordan <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Shaohua Li <[email protected]>
Cc: Hugh Dickins <[email protected]>
Cc: Minchan Kim <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Dan Williams <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | mm/swapfile.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index c291400c4463..3c1172b53436 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -269,7 +269,9 @@ static inline void cluster_set_null(struct swap_cluster_info *info) static inline bool cluster_is_huge(struct swap_cluster_info *info) { - return info->flags & CLUSTER_FLAG_HUGE; + if (IS_ENABLED(CONFIG_THP_SWAP)) + return info->flags & CLUSTER_FLAG_HUGE; + return false; } static inline void cluster_clear_huge(struct swap_cluster_info *info) @@ -1424,9 +1426,6 @@ static bool swap_page_trans_huge_swapped(struct swap_info_struct *si, int i; bool ret = false; - if (!IS_ENABLED(CONFIG_THP_SWAP)) - return swap_swapcount(si, entry) != 0; - ci = lock_cluster_or_swap_info(si, offset); if (!ci || !cluster_is_huge(ci)) { if (swap_count(map[roffset])) |