+ mm-remove-redundant-__gfp_nowarn.patch added to mm-new branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: mm: remove redundant __GFP_NOWARN
has been added to the -mm mm-new branch.  Its filename is
     mm-remove-redundant-__gfp_nowarn.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-remove-redundant-__gfp_nowarn.patch

This patch will later appear in the mm-new branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Note, mm-new is a provisional staging ground for work-in-progress
patches, and acceptance into mm-new is a notification for others take
notice and to finish up reviews.  Please do not hesitate to respond to
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fixup patches in mm-new.

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------------------------------------------------------
From: Qianfeng Rong <rongqianfeng@vivo.com>
Subject: mm: remove redundant __GFP_NOWARN
Date: Tue, 12 Aug 2025 21:52:25 +0800

Commit 16f5dfbc851b ("gfp: include __GFP_NOWARN in GFP_NOWAIT") made
GFP_NOWAIT implicitly include __GFP_NOWARN.

Therefore, explicit __GFP_NOWARN combined with GFP_NOWAIT (e.g.,
`GFP_NOWAIT | __GFP_NOWARN`) is now redundant.  Let's clean up these
redundant flags across subsystems.

No functional changes.

Link: https://lkml.kernel.org/r/20250812135225.274316-1-rongqianfeng@vivo.com
Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.com>
Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
Reviewed-by: Liam R. Howlett <Liam.Howlett@oracle.com>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Reviewed-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/damon/ops-common.c |    2 +-
 mm/filemap.c          |    2 +-
 mm/mmu_gather.c       |    4 ++--
 mm/rmap.c             |    2 +-
 mm/vmalloc.c          |    2 +-
 5 files changed, 6 insertions(+), 6 deletions(-)

--- a/mm/damon/ops-common.c~mm-remove-redundant-__gfp_nowarn
+++ a/mm/damon/ops-common.c
@@ -303,7 +303,7 @@ static unsigned int __damon_migrate_foli
 		 * instead of migrated.
 		 */
 		.gfp_mask = (GFP_HIGHUSER_MOVABLE & ~__GFP_RECLAIM) |
-			__GFP_NOWARN | __GFP_NOMEMALLOC | GFP_NOWAIT,
+			__GFP_NOMEMALLOC | GFP_NOWAIT,
 		.nid = target_nid,
 	};
 
--- a/mm/filemap.c~mm-remove-redundant-__gfp_nowarn
+++ a/mm/filemap.c
@@ -1961,7 +1961,7 @@ no_page:
 			gfp &= ~__GFP_FS;
 		if (fgp_flags & FGP_NOWAIT) {
 			gfp &= ~GFP_KERNEL;
-			gfp |= GFP_NOWAIT | __GFP_NOWARN;
+			gfp |= GFP_NOWAIT;
 		}
 		if (WARN_ON_ONCE(!(fgp_flags & (FGP_LOCK | FGP_FOR_MMAP))))
 			fgp_flags |= FGP_LOCK;
--- a/mm/mmu_gather.c~mm-remove-redundant-__gfp_nowarn
+++ a/mm/mmu_gather.c
@@ -32,7 +32,7 @@ static bool tlb_next_batch(struct mmu_ga
 	if (tlb->batch_count == MAX_GATHER_BATCH_COUNT)
 		return false;
 
-	batch = (void *)__get_free_page(GFP_NOWAIT | __GFP_NOWARN);
+	batch = (void *)__get_free_page(GFP_NOWAIT);
 	if (!batch)
 		return false;
 
@@ -364,7 +364,7 @@ void tlb_remove_table(struct mmu_gather
 	struct mmu_table_batch **batch = &tlb->batch;
 
 	if (*batch == NULL) {
-		*batch = (struct mmu_table_batch *)__get_free_page(GFP_NOWAIT | __GFP_NOWARN);
+		*batch = (struct mmu_table_batch *)__get_free_page(GFP_NOWAIT);
 		if (*batch == NULL) {
 			tlb_table_invalidate(tlb);
 			tlb_remove_table_one(table);
--- a/mm/rmap.c~mm-remove-redundant-__gfp_nowarn
+++ a/mm/rmap.c
@@ -285,7 +285,7 @@ int anon_vma_clone(struct vm_area_struct
 	list_for_each_entry_reverse(pavc, &src->anon_vma_chain, same_vma) {
 		struct anon_vma *anon_vma;
 
-		avc = anon_vma_chain_alloc(GFP_NOWAIT | __GFP_NOWARN);
+		avc = anon_vma_chain_alloc(GFP_NOWAIT);
 		if (unlikely(!avc)) {
 			unlock_anon_vma_root(root);
 			root = NULL;
--- a/mm/vmalloc.c~mm-remove-redundant-__gfp_nowarn
+++ a/mm/vmalloc.c
@@ -5196,7 +5196,7 @@ static void vmap_init_nodes(void)
 	int n = clamp_t(unsigned int, num_possible_cpus(), 1, 128);
 
 	if (n > 1) {
-		vn = kmalloc_array(n, sizeof(*vn), GFP_NOWAIT | __GFP_NOWARN);
+		vn = kmalloc_array(n, sizeof(*vn), GFP_NOWAIT);
 		if (vn) {
 			/* Node partition is 16 pages. */
 			vmap_zone_size = (1 << 4) * PAGE_SIZE;
_

Patches currently in -mm which might be from rongqianfeng@vivo.com are

xarray-remove-redundant-__gfp_nowarn.patch
maple_tree-remove-redundant-__gfp_nowarn.patch
mm-remove-redundant-__gfp_nowarn.patch
ref_tracker-remove-redundant-__gfp_nowarn.patch