Patch "mm/slab: Fix undefined init_cache_node_node() for NUMA and !SMP" has been added to the 5.15-stable tree

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This is a note to let you know that I've just added the patch titled

    mm/slab: Fix undefined init_cache_node_node() for NUMA and !SMP

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mm-slab-fix-undefined-init_cache_node_node-for-numa-and-smp.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 66a1c22b709178e7b823d44465d0c2e5ed7492fb Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Date: Tue, 21 Mar 2023 09:30:59 +0100
Subject: mm/slab: Fix undefined init_cache_node_node() for NUMA and !SMP
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>

commit 66a1c22b709178e7b823d44465d0c2e5ed7492fb upstream.

sh/migor_defconfig:

    mm/slab.c: In function ‘slab_memory_callback’:
    mm/slab.c:1127:23: error: implicit declaration of function ‘init_cache_node_node’; did you mean ‘drain_cache_node_node’? [-Werror=implicit-function-declaration]
     1127 |                 ret = init_cache_node_node(nid);
	  |                       ^~~~~~~~~~~~~~~~~~~~
	  |                       drain_cache_node_node

The #ifdef condition protecting the definition of init_cache_node_node()
no longer matches the conditions protecting the (multiple) users.

Fix this by syncing the conditions.

Fixes: 76af6a054da40553 ("mm/migrate: add CPU hotplug to demotion #ifdef")
Reported-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/b5bdea22-ed2f-3187-6efe-0c72330270a4@xxxxxxxxxxxxx
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Reviewed-by: John Paul Adrian Glaubitz <glaubitz@xxxxxxxxxxxxxxxxxxx>
Acked-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 mm/slab.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/mm/slab.c
+++ b/mm/slab.c
@@ -855,7 +855,7 @@ static int init_cache_node(struct kmem_c
 	return 0;
 }
 
-#if (defined(CONFIG_NUMA) && defined(CONFIG_MEMORY_HOTPLUG)) || defined(CONFIG_SMP)
+#if defined(CONFIG_NUMA) || defined(CONFIG_SMP)
 /*
  * Allocates and initializes node for a node on each slab cache, used for
  * either memory or cpu hotplug.  If memory is being hot-added, the kmem_cache_node


Patches currently in stable-queue which might be from geert+renesas@xxxxxxxxx are

queue-5.15/serial-8250-serial_8250_aspeed_vuart-should-depend-o.patch
queue-5.15/mm-slab-fix-undefined-init_cache_node_node-for-numa-and-smp.patch



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