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mm: remove PageMlocked

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This flag is now only used on folios, so we can remove all the page
accessors.

Link: https://lkml.kernel.org/r/20240821193445.2294269-7-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2024-08-21 20:34:39 +01:00 committed by Andrew Morton
parent cb29e7941d
commit 99f86bbda3
2 changed files with 10 additions and 7 deletions
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4
Documentation/mm/unevictable-lru.rst
View File

@ -253,8 +253,8 @@ Basic Management
mlocked pages - pages mapped into a VM_LOCKED VMA - are a class of unevictable
pages. When such a page has been "noticed" by the memory management subsystem,
the page is marked with the PG_mlocked flag. This can be manipulated using the
PageMlocked() functions.
the folio is marked with the PG_mlocked flag. This can be manipulated using
folio_set_mlocked() and folio_clear_mlocked() functions.
A PG_mlocked page will be placed on the unevictable list when it is added to
the LRU. Such pages can be "noticed" by memory management in several places:

13
include/linux/page-flags.h
View File

@ -585,12 +585,15 @@ FOLIO_FLAG(unevictable, FOLIO_HEAD_PAGE)
FOLIO_TEST_CLEAR_FLAG(unevictable, FOLIO_HEAD_PAGE)
#ifdef CONFIG_MMU
PAGEFLAG(Mlocked, mlocked, PF_NO_TAIL)
__CLEARPAGEFLAG(Mlocked, mlocked, PF_NO_TAIL)
TESTSCFLAG(Mlocked, mlocked, PF_NO_TAIL)
FOLIO_FLAG(mlocked, FOLIO_HEAD_PAGE)
__FOLIO_CLEAR_FLAG(mlocked, FOLIO_HEAD_PAGE)
FOLIO_TEST_CLEAR_FLAG(mlocked, FOLIO_HEAD_PAGE)
FOLIO_TEST_SET_FLAG(mlocked, FOLIO_HEAD_PAGE)
#else
PAGEFLAG_FALSE(Mlocked, mlocked) __CLEARPAGEFLAG_NOOP(Mlocked, mlocked)
TESTSCFLAG_FALSE(Mlocked, mlocked)
FOLIO_FLAG_FALSE(mlocked)
__FOLIO_CLEAR_FLAG_NOOP(mlocked)
FOLIO_TEST_CLEAR_FLAG_FALSE(mlocked)
FOLIO_TEST_SET_FLAG_FALSE(mlocked)
#endif
#ifdef CONFIG_ARCH_USES_PG_UNCACHED