linux-kernel - [PATCH 3/4] proc: kmalloc struct pde

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Message-ID: <20161029155747.GC1246@avx2>
Date:   Sat, 29 Oct 2016 18:57:47 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     akpm@...ux-foundation.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] proc: kmalloc struct pde_opener

kzalloc is too much, half of the fields will be reinitialized anyway.

If proc file doesn't have ->release hook (some still do not), clearing
is unnecessary because it will be freed immediately.

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 fs/proc/inode.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -321,7 +321,7 @@ static int proc_reg_open(struct inode *inode, struct file *file)
 	 * by hand in remove_proc_entry(). For this, save opener's credentials
 	 * for later.
 	 */
-	pdeo = kzalloc(sizeof(struct pde_opener), GFP_KERNEL);
+	pdeo = kmalloc(sizeof(struct pde_opener), GFP_KERNEL);
 	if (!pdeo)
 		return -ENOMEM;
 
@@ -338,6 +338,8 @@ static int proc_reg_open(struct inode *inode, struct file *file)
 	if (rv == 0 && release) {
 		/* To know what to release. */
 		pdeo->file = file;
+		pdeo->closing = false;
+		pdeo->c = NULL;
 		/* Strictly for "too late" ->release in proc_reg_release(). */
 		spin_lock(&pde->pde_unload_lock);
 		list_add(&pdeo->lh, &pde->pde_openers);