+ ratelimit-convert-flags-to-int-to-save-8-bytes-in-size.patch added to mm-nonmm-unstable branch

+ ratelimit-convert-flags-to-int-to-save-8-bytes-in-size.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: ratelimit: convert flags to int to save 8 bytes in size
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     ratelimit-convert-flags-to-int-to-save-8-bytes-in-size.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/ratelimit-convert-flags-to-int-to-save-8-bytes-in-size.patch

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

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------------------------------------------------------
From: Mateusz Guzik <mjguzik@gmail.com>
Subject: ratelimit: convert flags to int to save 8 bytes in size
Date: Sat, 17 Aug 2024 14:37:54 +0200

Only bit 1 is used, making an unsigned long a total overkill.

This brings it from 40 to 32 bytes, which in turn shrinks user_struct from
136 to 128 bytes.  Since the latter is allocated with hwalign, this means
the total usage goes down from 192 to 128 bytes per object.

No functional changes.

Link: https://lkml.kernel.org/r/20240817123754.240924-1-mjguzik@gmail.com
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/ratelimit_types.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/linux/ratelimit_types.h~ratelimit-convert-flags-to-int-to-save-8-bytes-in-size
+++ a/include/linux/ratelimit_types.h
@@ -19,8 +19,8 @@ struct ratelimit_state {
 	int		burst;
 	int		printed;
 	int		missed;
+	unsigned int	flags;
 	unsigned long	begin;
-	unsigned long	flags;
 };
 
 #define RATELIMIT_STATE_INIT_FLAGS(name, interval_init, burst_init, flags_init) { \
_

Patches currently in -mm which might be from mjguzik@gmail.com are

ratelimit-convert-flags-to-int-to-save-8-bytes-in-size.patch