linux-kernel - [PATCH 2/2] proc: fix .s_blocksize and .s_blocksize

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Date:   Tue, 31 Jan 2023 23:55:59 +0800
From:   Chao Yu <chao@...nel.org>
To:     akpm@...ux-foundation.org, adobriyan@...il.com
Cc:     viro@...iv.linux.org.uk, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, Chao Yu <chao@...nel.org>
Subject: [PATCH 2/2] proc: fix .s_blocksize and .s_blocksize_bits

procfs uses seq_file's operations to process IO, and seq_file
uses PAGE_SIZE as basic operating unit, so, fix to update
.s_blocksize and .s_blocksize_bits from 1024 and 10 to PAGE_SIZE
and PAGE_SHIFT.

Signed-off-by: Chao Yu <chao@...nel.org>
---
v2:
- fix to update blocksize to PAGE_SIZE pointed out by Alexey Dobriyan.
 fs/proc/root.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/proc/root.c b/fs/proc/root.c
index 3c2ee3eb1138..8bf5a9080adc 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -173,8 +173,8 @@ static int proc_fill_super(struct super_block *s, struct fs_context *fc)
 	/* User space would break if executables or devices appear on proc */
 	s->s_iflags |= SB_I_USERNS_VISIBLE | SB_I_NOEXEC | SB_I_NODEV;
 	s->s_flags |= SB_NODIRATIME | SB_NOSUID | SB_NOEXEC;
-	s->s_blocksize = 1024;
-	s->s_blocksize_bits = 10;
+	s->s_blocksize = PAGE_SIZE;
+	s->s_blocksize_bits = PAGE_SHIFT;
 	s->s_magic = PROC_SUPER_MAGIC;
 	s->s_op = &proc_sops;
 	s->s_time_gran = 1;
-- 
2.36.1