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authorArun KS <arunks@codeaurora.org>2018-12-28 11:34:29 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-12-28 23:11:47 +0300
commitca79b0c211af63fa3276f0e3fd7dd9ada2439839 (patch)
treea9198e85582744619903c85349583bb453fe36cb /mm/swap.c
parent9705bea5f833f4fc21d5bef5fce7348427f76ea4 (diff)
downloadlinux-ca79b0c211af63fa3276f0e3fd7dd9ada2439839.tar.xz
mm: convert totalram_pages and totalhigh_pages variables to atomic
totalram_pages and totalhigh_pages are made static inline function. Main motivation was that managed_page_count_lock handling was complicating things. It was discussed in length here, https://lore.kernel.org/patchwork/patch/995739/#1181785 So it seemes better to remove the lock and convert variables to atomic, with preventing poteintial store-to-read tearing as a bonus. [akpm@linux-foundation.org: coding style fixes] Link: http://lkml.kernel.org/r/1542090790-21750-4-git-send-email-arunks@codeaurora.org Signed-off-by: Arun KS <arunks@codeaurora.org> Suggested-by: Michal Hocko <mhocko@suse.com> Suggested-by: Vlastimil Babka <vbabka@suse.cz> Reviewed-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: David Hildenbrand <david@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/swap.c')
-rw-r--r--mm/swap.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/swap.c b/mm/swap.c
index 5d786019eab9..4d8a1f1afaab 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -1022,7 +1022,7 @@ EXPORT_SYMBOL(pagevec_lookup_range_nr_tag);
*/
void __init swap_setup(void)
{
- unsigned long megs = totalram_pages >> (20 - PAGE_SHIFT);
+ unsigned long megs = totalram_pages() >> (20 - PAGE_SHIFT);
/* Use a smaller cluster for small-memory machines */
if (megs < 16)