Commit 4141c2dc authored Aug 12, 2025 by Lorenzo Stoakes Committed by Andrew Morton Sep 13, 2025

mm: convert arch-specific code 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.

No functional change intended.

[lorenzo.stoakes@oracle.com: fix typo]
  Link: https://lkml.kernel.org/r/f8ff8fe9-0c89-4742-bf52-d31319d948c1@lucifer.local
Link: https://lkml.kernel.org/r/6e0a4563fcade8678d0fc99859b3998d4354e82f.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>
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: Baolin Wang <baolin.wang@linux.alibaba.com>
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 879d0d99

arch/s390/mm/mmap.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -182,10 +182,10 @@ void arch_pick_mmap_layout(struct mm_struct mm, struct rlimit rlim_stack)
		*/
		if (mmap_is_legacy(rlim_stack)) {
		mm->mmap_base = mmap_base_legacy(random_factor);
		clear_bit(MMF_TOPDOWN, &mm->flags);
		mm_flags_clear(MMF_TOPDOWN, mm);
		} else {
		mm->mmap_base = mmap_base(random_factor, rlim_stack);
		set_bit(MMF_TOPDOWN, &mm->flags);
		mm_flags_set(MMF_TOPDOWN, mm);
		}
		}

arch/sparc/kernel/sys_sparc_64.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -309,7 +309,7 @@ void arch_pick_mmap_layout(struct mm_struct mm, struct rlimit rlim_stack)
		gap == RLIM_INFINITY \|\|
		sysctl_legacy_va_layout) {
		mm->mmap_base = TASK_UNMAPPED_BASE + random_factor;
		clear_bit(MMF_TOPDOWN, &mm->flags);
		mm_flags_clear(MMF_TOPDOWN, mm);
		} else {
		/* We know it's 32-bit */
		unsigned long task_size = STACK_TOP32;
		@@ -320,7 +320,7 @@ void arch_pick_mmap_layout(struct mm_struct mm, struct rlimit rlim_stack)
		gap = (task_size / 6 * 5);

		mm->mmap_base = PAGE_ALIGN(task_size - gap - random_factor);
		set_bit(MMF_TOPDOWN, &mm->flags);
		mm_flags_set(MMF_TOPDOWN, mm);
		}
		}

arch/x86/mm/mmap.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -122,9 +122,9 @@ static void arch_pick_mmap_base(unsigned long base, unsigned long legacy_base,
		void arch_pick_mmap_layout(struct mm_struct mm, struct rlimit rlim_stack)
		{
		if (mmap_is_legacy())
		clear_bit(MMF_TOPDOWN, &mm->flags);
		mm_flags_clear(MMF_TOPDOWN, mm);
		else
		set_bit(MMF_TOPDOWN, &mm->flags);
		mm_flags_set(MMF_TOPDOWN, mm);

		arch_pick_mmap_base(&mm->mmap_base, &mm->mmap_legacy_base,
		arch_rnd(mmap64_rnd_bits), task_size_64bit(0),