diff options
| author | Huang Ying <ying.huang@intel.com> | 2018-10-27 01:03:49 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-10-27 02:25:19 +0300 |
| commit | 10e364da10d73ce4e3b61e1c53319ce93ee51c63 (patch) | |
| tree | dc59810d6cad5311837e68142c84b0cc02339169 | |
| parent | bcd49e86710b42f15c7512de594d23b3ae0b21d7 (diff) | |
| download | linux-10e364da10d73ce4e3b61e1c53319ce93ee51c63.tar.xz | |
mm/swapfile.c: call free_swap_slot() in __swap_entry_free()
This is a code cleanup patch without functionality change.
Originally, when __swap_entry_free() is called, and its return value is 0,
free_swap_slot() will always be called to free the swap entry to the
per-CPU pool. So move the call to free_swap_slot() to __swap_entry_free()
to simplify the code.
Link: http://lkml.kernel.org/r/20180827075535.17406-3-ying.huang@intel.com
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Shaohua Li <shli@kernel.org>
Cc: Hugh Dickins <hughd@google.com>
Cc: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/swapfile.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c index 0d44179213ed..eaa5e2e55cab 100644 --- a/mm/swapfile.c +++ b/mm/swapfile.c @@ -1182,6 +1182,8 @@ static unsigned char __swap_entry_free(struct swap_info_struct *p, ci = lock_cluster_or_swap_info(p, offset); usage = __swap_entry_free_locked(p, offset, usage); unlock_cluster_or_swap_info(p, ci); + if (!usage) + free_swap_slot(entry); return usage; } @@ -1212,10 +1214,8 @@ void swap_free(swp_entry_t entry) struct swap_info_struct *p; p = _swap_info_get(entry); - if (p) { - if (!__swap_entry_free(p, entry, 1)) - free_swap_slot(entry); - } + if (p) + __swap_entry_free(p, entry, 1); } /* @@ -1637,8 +1637,6 @@ int free_swap_and_cache(swp_entry_t entry) !swap_page_trans_huge_swapped(p, entry)) __try_to_reclaim_swap(p, swp_offset(entry), TTRS_UNMAPPED | TTRS_FULL); - else if (!count) - free_swap_slot(entry); } return p != NULL; } |