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| author | Muchun Song <songmuchun@bytedance.com> | 2021-09-07 19:55:55 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-09-08 11:50:23 -0700 |
| commit | fe3df441ef885a75a3eff5e151ead1a92266d222 (patch) | |
| tree | 9e1d1e5c4b1851cb9c825adef186380161b7638a /mm/ioremap.c | |
| parent | 5ef5f810199f421cb6455aa018fb8f21151b4a16 (diff) | |
| download | linux-fe3df441ef885a75a3eff5e151ead1a92266d222.tar.bz2 | |
mm: remove redundant compound_head() calling
There is a READ_ONCE() in the macro of compound_head(), which will prevent
compiler from optimizing the code when there are more than once calling of
it in a function. Remove the redundant calling of compound_head() from
page_to_index() and page_add_file_rmap() for better code generation.
Link: https://lkml.kernel.org/r/20210811101431.83940-1-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Reviewed-by: David Howells <dhowells@redhat.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: William Kucharski <william.kucharski@oracle.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/ioremap.c')
0 files changed, 0 insertions, 0 deletions