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authorHuang Ying <ying.huang@intel.com>2018-08-21 21:52:24 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-22 10:52:44 -0700
commitb32d5f32b9dbe64970f41602066f7904df15f3e9 (patch)
tree3c9255d3f983350ea545b175e91bc334865759ea /mm
parent5d5e8f19544a35ae1609bd96ae6b28c9fcd1baf6 (diff)
downloadlinux-stericsson-b32d5f32b9dbe64970f41602066f7904df15f3e9.tar.gz
mm/swapfile.c: add __swap_entry_free_locked()
The part of __swap_entry_free() with lock held is separated into a new function __swap_entry_free_locked(). Because we want to reuse that piece of code in some other places. Just mechanical code refactoring, there is no any functional change in this function. Link: http://lkml.kernel.org/r/20180720071845.17920-8-ying.huang@intel.com Signed-off-by: "Huang, Ying" <ying.huang@intel.com> Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com> Acked-by: 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> Cc: Rik van Riel <riel@redhat.com> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Matthew Wilcox <willy@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/swapfile.c20
1 files changed, 14 insertions, 6 deletions
diff --git a/mm/swapfile.c b/mm/swapfile.c
index b30dd0642ccf..d44b2d60a66a 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1123,16 +1123,13 @@ static struct swap_info_struct *swap_info_get_cont(swp_entry_t entry,
return p;
}
-static unsigned char __swap_entry_free(struct swap_info_struct *p,
- swp_entry_t entry, unsigned char usage)
+static unsigned char __swap_entry_free_locked(struct swap_info_struct *p,
+ unsigned long offset,
+ unsigned char usage)
{
- struct swap_cluster_info *ci;
- unsigned long offset = swp_offset(entry);
unsigned char count;
unsigned char has_cache;
- ci = lock_cluster_or_swap_info(p, offset);
-
count = p->swap_map[offset];
has_cache = count & SWAP_HAS_CACHE;
@@ -1160,6 +1157,17 @@ static unsigned char __swap_entry_free(struct swap_info_struct *p,
usage = count | has_cache;
p->swap_map[offset] = usage ? : SWAP_HAS_CACHE;
+ return usage;
+}
+
+static unsigned char __swap_entry_free(struct swap_info_struct *p,
+ swp_entry_t entry, unsigned char usage)
+{
+ struct swap_cluster_info *ci;
+ unsigned long offset = swp_offset(entry);
+
+ ci = lock_cluster_or_swap_info(p, offset);
+ usage = __swap_entry_free_locked(p, offset, usage);
unlock_cluster_or_swap_info(p, ci);
return usage;