From: Baokun Li Now tmpfs enables i_version by default and tmpfs does not modify it. But SB_I_VERSION can also be modified via sb_flags, and reconfigure_super() always overwrites the existing flags with the latest ones. This means that if tmpfs is remounted without specifying iversion, the default i_version will be unexpectedly disabled. To ensure iversion remains enabled, SB_I_VERSION is now always set for fc->sb_flags in shmem_init_fs_context(), instead of for sb->s_flags in shmem_fill_super(). Fixes: 36f05cab0a2c ("tmpfs: add support for an i_version counter") Signed-off-by: Baokun Li --- mm/shmem.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/mm/shmem.c b/mm/shmem.c index e2c76a30802b..eebe12ff5bc6 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -5081,7 +5081,7 @@ static int shmem_fill_super(struct super_block *sb, struct fs_context *fc) sb->s_flags |= SB_NOUSER; } sb->s_export_op = &shmem_export_ops; - sb->s_flags |= SB_NOSEC | SB_I_VERSION; + sb->s_flags |= SB_NOSEC; #if IS_ENABLED(CONFIG_UNICODE) if (!ctx->encoding && ctx->strict_encoding) { @@ -5385,6 +5385,9 @@ int shmem_init_fs_context(struct fs_context *fc) fc->fs_private = ctx; fc->ops = &shmem_fs_context_ops; +#ifdef CONFIG_TMPFS + fc->sb_flags |= SB_I_VERSION; +#endif return 0; } -- 2.39.2