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SubjectRe: [PATCH RESEND] ext4: Switch to kvfree_rcu() API
On Wed, Dec 15, 2021 at 12:18:39PM +0100, Uladzislau Rezki (Sony) wrote:
> From: Uladzislau Rezki <uladzislau.rezki@sony.com>
>
> Instead of invoking a synchronize_rcu() to free a pointer
> after a grace period we can directly make use of new API
> that does the same but in more efficient way.
>
> TO: "Theodore Ts'o" <tytso@mit.edu>
> TO: linux-ext4@vger.kernel.org
> Signed-off-by: Uladzislau Rezki <uladzislau.rezki@sony.com>
> ---
> fs/ext4/super.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/fs/ext4/super.c b/fs/ext4/super.c
> index 4e33b5eca694..111b0498a232 100644
> --- a/fs/ext4/super.c
> +++ b/fs/ext4/super.c
> @@ -1886,8 +1886,7 @@ static int clear_qf_name(struct super_block *sb, int qtype)
> return -1;
> }
> rcu_assign_pointer(sbi->s_qf_names[qtype], NULL);
> - synchronize_rcu();
> - kfree(old_qname);
> + kvfree_rcu(old_qname);
> return 1;
> }
> #endif
> --
> 2.30.2
>
+ "Theodore Ts'o" <tytso@mit.edu>
+ linux-ext4@vger.kernel.org

--
Vlad Rezki

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