[merged mm-stable] mm-remove-__alloc_pages_node.patch removed from -mm tree

[merged mm-stable] mm-remove-__alloc_pages_node.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: mm: remove __alloc_pages_node()
has been removed from the -mm tree.  Its filename was
     mm-remove-__alloc_pages_node.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Brendan Jackman <jackmanb@google.com>
Subject: mm: remove __alloc_pages_node()
Date: Fri, 03 Jul 2026 12:31:53 +0000

There were only a few users, which have been removed.  The only advantage
of this API over alloc_pages_node() is avoiding a single conditional
branch.  The disadvantages are:

1. More API surface, more sources of confusion, more maintenance.

2. Worse impact of CPU hotplug bugs: most users of __alloc_pages_node()
   were using the result of cpu_to_node(); if the CPU gets hotplugged
   out this will return NUMA_NO_NODE. If one of these paths fails to
   protect against a concurrent hotplug then page_alloc.c will use
   NUMA_NO_NODE as an index into NODE_DATA() and cause some horrible
   memory corruption or other. With alloc_pages_node(), the code might
   just work fine.

Ulterior motive: this frees up the __* variants of the allocator APIs to
serve specifically for use as mm-internal API.

Link: https://lore.kernel.org/20260703-alloc-trylock-v5-13-c87b714e19d3@google.com
Signed-off-by: Brendan Jackman <jackmanb@google.com>
Reviewed-by: Suren Baghdasaryan <surenb@google.com>
Reviewed-by: Vlastimil Babka (SUSE) <vbabka@kernel.org>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/gfp.h |   20 ++++----------------
 1 file changed, 4 insertions(+), 16 deletions(-)

--- a/include/linux/gfp.h~mm-remove-__alloc_pages_node
+++ a/include/linux/gfp.h
@@ -256,21 +256,6 @@ static inline void warn_if_node_offline(
 	dump_stack();
 }
 
-/*
- * Allocate pages, preferring the node given as nid. The node must be valid and
- * online. For more general interface, see alloc_pages_node().
- */
-static inline struct page *
-__alloc_pages_node_noprof(int nid, gfp_t gfp_mask, unsigned int order)
-{
-	VM_BUG_ON(nid < 0 || nid >= MAX_NUMNODES);
-	warn_if_node_offline(nid, gfp_mask);
-
-	return __alloc_pages_noprof(gfp_mask, order, nid, NULL);
-}
-
-#define  __alloc_pages_node(...)		alloc_hooks(__alloc_pages_node_noprof(__VA_ARGS__))
-
 static inline
 struct folio *__folio_alloc_node_noprof(gfp_t gfp, unsigned int order, int nid)
 {
@@ -293,7 +278,10 @@ static inline struct page *alloc_pages_n
 	if (nid == NUMA_NO_NODE)
 		nid = numa_mem_id();
 
-	return __alloc_pages_node_noprof(nid, gfp_mask, order);
+	VM_BUG_ON(nid < 0 || nid >= MAX_NUMNODES);
+	warn_if_node_offline(nid, gfp_mask);
+
+	return __alloc_pages_noprof(gfp_mask, order, nid, NULL);
 }
 
 #define  alloc_pages_node(...)			alloc_hooks(alloc_pages_node_noprof(__VA_ARGS__))
_

Patches currently in -mm which might be from jackmanb@google.com are

mm-secretmem-dont-allow-highmem-folios.patch
mm-page_alloc-dont-spin_trylock-in-nmi-on-up.patch
mm-page_alloc-dont-spin_trylock-when-disallowed-in-free_one_page.patch
mm-page_alloc-rename-fpi_trylock-fpi_nolock.patch
cgroup-cpuset-update-some-comments-about-the-page-allocator.patch
mm-page_alloc-fixup-alloc_pages_nolock_noprof-comment.patch
mm-page_alloc-remove-a-couple-of-vm_bug_onst.patch