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

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

[Andrew Morton]

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
review feedback and post updated versions to replace or incrementally
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