From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 21 Apr 2016 00:49:14 +0000 (-0400)
Subject: lustre: don't need to lock inode in directory lseek
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=060ff688cadac398a17f09bd87b16fd0bf943899;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

lustre: don't need to lock inode in directory lseek

Note that lustre has its private mutex protecting directory pagecache;
if they ever remove it, they'll need to be careful with PageChecked()
use.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/drivers/staging/lustre/lustre/llite/dir.c b/drivers/staging/lustre/lustre/llite/dir.c
index e4c82883e580..7a0a67f3c4e7 100644
--- a/drivers/staging/lustre/lustre/llite/dir.c
+++ b/drivers/staging/lustre/lustre/llite/dir.c
@@ -1865,7 +1865,6 @@ static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
 	int api32 = ll_need_32bit_api(sbi);
 	loff_t ret = -EINVAL;
 
-	inode_lock(inode);
 	switch (origin) {
 	case SEEK_SET:
 		break;
@@ -1903,7 +1902,6 @@ static loff_t ll_dir_seek(struct file *file, loff_t offset, int origin)
 	goto out;
 
 out:
-	inode_unlock(inode);
 	return ret;
 }
 
@@ -1922,7 +1920,7 @@ const struct file_operations ll_dir_operations = {
 	.open     = ll_dir_open,
 	.release  = ll_dir_release,
 	.read     = generic_read_dir,
-	.iterate  = ll_readdir,
+	.iterate_shared  = ll_readdir,
 	.unlocked_ioctl   = ll_dir_ioctl,
 	.fsync    = ll_fsync,
 };