linux-kernel - [PATCH 11/13] proc: readdir /proc/*/task

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Message-Id: <20180827231503.26899-11-adobriyan@gmail.com>
Date:   Tue, 28 Aug 2018 02:15:01 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     akpm@...ux-foundation.org
Cc:     linux-kernel@...r.kernel.org, Alexey Dobriyan <adobriyan@...il.com>
Subject: [PATCH 11/13] proc: readdir /proc/*/task

---
 fs/proc/base.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 33f444721965..668e465c86b3 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -3549,11 +3549,11 @@ static int proc_task_readdir(struct file *file, struct dir_context *ctx)
 	for (task = first_tid(proc_pid(inode), tid, ctx->pos - 2, ns);
 	     task;
 	     task = next_tid(task), ctx->pos++) {
-		char name[10 + 1];
-		unsigned int len;
+		char name[10], *p = name + sizeof(name);
+
 		tid = task_pid_nr_ns(task, ns);
-		len = snprintf(name, sizeof(name), "%u", tid);
-		if (!proc_fill_cache(file, ctx, name, len,
+		p = _print_integer_u32(p, tid);
+		if (!proc_fill_cache(file, ctx, p, name + sizeof(name) - p,
 				proc_task_instantiate, task, NULL)) {
 			/* returning this tgid failed, save it as the first
 			 * pid for the next readir call */
-- 
2.16.4