+ proc-stop-using-seq_get_buf-in-proc_task_name.patch added to -mm tree

+ proc-stop-using-seq_get_buf-in-proc_task_name.patch added to -mm tree

[akpm]

The patch titled
     Subject: proc: stop using seq_get_buf in proc_task_name
has been added to the -mm tree.  Its filename is
     proc-stop-using-seq_get_buf-in-proc_task_name.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/proc-stop-using-seq_get_buf-in-proc_task_name.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/proc-stop-using-seq_get_buf-in-proc_task_name.patch

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------------------------------------------------------
From: Christoph Hellwig <hch@lst.de>
Subject: proc: stop using seq_get_buf in proc_task_name

Use seq_escape_str and seq_printf instead of poking holes into the
seq_file abstraction.

Link: https://lkml.kernel.org/r/20210810151945.1795567-1-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 fs/proc/array.c |   18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

--- a/fs/proc/array.c~proc-stop-using-seq_get_buf-in-proc_task_name
+++ a/fs/proc/array.c
@@ -98,27 +98,17 @@
 
 void proc_task_name(struct seq_file *m, struct task_struct *p, bool escape)
 {
-	char *buf;
-	size_t size;
 	char tcomm[64];
-	int ret;
 
 	if (p->flags & PF_WQ_WORKER)
 		wq_worker_comm(tcomm, sizeof(tcomm), p);
 	else
 		__get_task_comm(tcomm, sizeof(tcomm), p);
 
-	size = seq_get_buf(m, &buf);
-	if (escape) {
-		ret = string_escape_str(tcomm, buf, size,
-					ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\");
-		if (ret >= size)
-			ret = -1;
-	} else {
-		ret = strscpy(buf, tcomm, size);
-	}
-
-	seq_commit(m, ret);
+	if (escape)
+		seq_escape_str(m, tcomm, ESCAPE_SPACE | ESCAPE_SPECIAL, "\n\\");
+	else
+		seq_printf(m, "%.64s", tcomm);
 }
 
 /*
_

Patches currently in -mm which might be from hch@lst.de are

mmc-jz4740-remove-the-flush_kernel_dcache_page-call-in-jz4740_mmc_read_data.patch
mmc-mmc_spi-replace-flush_kernel_dcache_page-with-flush_dcache_page.patch
scatterlist-replace-flush_kernel_dcache_page-with-flush_dcache_page.patch
mm-remove-flush_kernel_dcache_page.patch
proc-stop-using-seq_get_buf-in-proc_task_name.patch