+ mm-mmap-use-sz_8k-128k-helper-macro.patch added to mm-unstable branch

+ mm-mmap-use-sz_8k-128k-helper-macro.patch added to mm-unstable branch

[Andrew Morton]

The patch titled
     Subject: mm/mmap: use SZ_{8K, 128K} helper macro
has been added to the -mm mm-unstable branch.  Its filename is
     mm-mmap-use-sz_8k-128k-helper-macro.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-mmap-use-sz_8k-128k-helper-macro.patch

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

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------------------------------------------------------
From: Yajun Deng <yajun.deng@linux.dev>
Subject: mm/mmap: use SZ_{8K, 128K} helper macro
Date: Wed, 31 Jan 2024 11:19:13 +0800

Use SZ_{8K, 128K} helper macro instead of the number in init_user_reserve
and reserve_mem_notifier. This is more readable.

Link: https://lkml.kernel.org/r/20240131031913.2058597-1-yajun.deng@linux.dev
Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/mmap.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/mm/mmap.c~mm-mmap-use-sz_8k-128k-helper-macro
+++ a/mm/mmap.c
@@ -3845,7 +3845,7 @@ static int init_user_reserve(void)
 
 	free_kbytes = K(global_zone_page_state(NR_FREE_PAGES));
 
-	sysctl_user_reserve_kbytes = min(free_kbytes / 32, 1UL << 17);
+	sysctl_user_reserve_kbytes = min(free_kbytes / 32, SZ_128K);
 	return 0;
 }
 subsys_initcall(init_user_reserve);
@@ -3866,7 +3866,7 @@ static int init_admin_reserve(void)
 
 	free_kbytes = K(global_zone_page_state(NR_FREE_PAGES));
 
-	sysctl_admin_reserve_kbytes = min(free_kbytes / 32, 1UL << 13);
+	sysctl_admin_reserve_kbytes = min(free_kbytes / 32, SZ_8K);
 	return 0;
 }
 subsys_initcall(init_admin_reserve);
@@ -3898,12 +3898,12 @@ static int reserve_mem_notifier(struct n
 	case MEM_ONLINE:
 		/* Default max is 128MB. Leave alone if modified by operator. */
 		tmp = sysctl_user_reserve_kbytes;
-		if (0 < tmp && tmp < (1UL << 17))
+		if (tmp > 0 && tmp < SZ_128K)
 			init_user_reserve();
 
 		/* Default max is 8MB.  Leave alone if modified by operator. */
 		tmp = sysctl_admin_reserve_kbytes;
-		if (0 < tmp && tmp < (1UL << 13))
+		if (tmp > 0 && tmp < SZ_8K)
 			init_admin_reserve();
 
 		break;
_

Patches currently in -mm which might be from yajun.deng@linux.dev are

mm-mmap-simplify-vma-link-and-unlink.patch
mm-mmap-introduce-vma_set_range.patch
mm-mmap-use-sz_8k-128k-helper-macro.patch