Commit 99f86bbd authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle) Committed by Andrew Morton
Browse files

mm: remove PageMlocked 

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: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent cb29e794

Documentation/mm/unevictable-lru.rst

+2 −2
Original line number Diff line number Diff line
@@ -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:

include/linux/page-flags.h

+8 −5
Original line number Diff line number Diff line
@@ -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