Commit 12e423ba authored Aug 12, 2025 by Lorenzo Stoakes Committed by Andrew Morton Sep 13, 2025

mm: convert core mm to mm_flags_*() accessors

As part of the effort to move to mm->flags becoming a bitmap field,
convert existing users to making use of the mm_flags_*() accessors which
will, when the conversion is complete, be the only means of accessing
mm_struct flags.

This will result in the debug output being that of a bitmap output, which
will result in a minor change here, but since this is for debug only, this
should have no bearing.

Otherwise, no functional changes intended.

[akpm@linux-foundation.org: fix typo in comment]Link: https://lkml.kernel.org/r/1eb2266f4408798a55bda00cb04545a3203aa572.1755012943.git.lorenzo.stoakes@oracle.com


Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Barry Song <baohua@kernel.org>
Cc: Ben Segall <bsegall@google.com>
Cc: Borislav Betkov <bp@alien8.de>
Cc: Chengming Zhou <chengming.zhou@linux.dev>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Christian Brauner <brauner@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Dev Jain <dev.jain@arm.com>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>
Cc: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Jann Horn <jannh@google.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Kees Cook <kees@kernel.org>
Cc: Marc Rutland <mark.rutland@arm.com>
Cc: Mariano Pache <npache@redhat.com>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Mateusz Guzik <mjguzik@gmail.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Mel Gorman <mgorman <mgorman@suse.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Namhyung kim <namhyung@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Shakeel Butt <shakeel.butt@linux.dev>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Thomas Gleinxer <tglx@linutronix.de>
Cc: Valentin Schneider <vschneid@redhat.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: xu xin <xu.xin16@zte.com.cn>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

parent bb6525f2

include/linux/huge_mm.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -327,7 +327,7 @@ static inline bool vma_thp_disabled(struct vm_area_struct *vma,
		* example, s390 kvm.
		*/
		return (vm_flags & VM_NOHUGEPAGE) \|\|
		test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags);
		mm_flags_test(MMF_DISABLE_THP, vma->vm_mm);
		}

		static inline bool thp_disabled_by_hw(void)

include/linux/khugepaged.h

+4 −2

Original line number	Diff line number	Diff line
		@@ -2,6 +2,8 @@
		#ifndef _LINUX_KHUGEPAGED_H
		#define _LINUX_KHUGEPAGED_H

		#include <linux/mm.h>

		extern unsigned int khugepaged_max_ptes_none __read_mostly;
		#ifdef CONFIG_TRANSPARENT_HUGEPAGE
		extern struct attribute_group khugepaged_attr_group;
		@@ -20,13 +22,13 @@ extern int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr,

		static inline void khugepaged_fork(struct mm_struct mm, struct mm_struct oldmm)
		{
		if (test_bit(MMF_VM_HUGEPAGE, &oldmm->flags))
		if (mm_flags_test(MMF_VM_HUGEPAGE, oldmm))
		__khugepaged_enter(mm);
		}

		static inline void khugepaged_exit(struct mm_struct *mm)
		{
		if (test_bit(MMF_VM_HUGEPAGE, &mm->flags))
		if (mm_flags_test(MMF_VM_HUGEPAGE, mm))
		__khugepaged_exit(mm);
		}
		#else /* CONFIG_TRANSPARENT_HUGEPAGE */

include/linux/ksm.h

+3 −3

Original line number	Diff line number	Diff line
		@@ -56,13 +56,13 @@ static inline long mm_ksm_zero_pages(struct mm_struct *mm)
		static inline void ksm_fork(struct mm_struct mm, struct mm_struct oldmm)
		{
		/* Adding mm to ksm is best effort on fork. */
		if (test_bit(MMF_VM_MERGEABLE, &oldmm->flags))
		if (mm_flags_test(MMF_VM_MERGEABLE, oldmm))
		__ksm_enter(mm);
		}

		static inline int ksm_execve(struct mm_struct *mm)
		{
		if (test_bit(MMF_VM_MERGE_ANY, &mm->flags))
		if (mm_flags_test(MMF_VM_MERGE_ANY, mm))
		return __ksm_enter(mm);

		return 0;
		@@ -70,7 +70,7 @@ static inline int ksm_execve(struct mm_struct *mm)

		static inline void ksm_exit(struct mm_struct *mm)
		{
		if (test_bit(MMF_VM_MERGEABLE, &mm->flags))
		if (mm_flags_test(MMF_VM_MERGEABLE, mm))
		__ksm_exit(mm);
		}

include/linux/mm.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -1949,7 +1949,7 @@ static inline bool folio_needs_cow_for_dma(struct vm_area_struct *vma,
		{
		VM_BUG_ON(!(raw_read_seqcount(&vma->vm_mm->write_protect_seq) & 1));

		if (!test_bit(MMF_HAS_PINNED, &vma->vm_mm->flags))
		if (!mm_flags_test(MMF_HAS_PINNED, vma->vm_mm))
		return false;

		return folio_maybe_dma_pinned(folio);

include/linux/mman.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -201,7 +201,7 @@ static inline bool arch_memory_deny_write_exec_supported(void)
		static inline bool map_deny_write_exec(unsigned long old, unsigned long new)
		{
		/* If MDWE is disabled, we have nothing to deny. */
		if (!test_bit(MMF_HAS_MDWE, &current->mm->flags))
		if (!mm_flags_test(MMF_HAS_MDWE, current->mm))
		return false;

		/* If the new VMA is not executable, we have nothing to deny. */