[PATCH] f2fs: allow F2FS_IPU_NOCACHE for pinned file

[Jaegeuk Kim]

This patch allows f2fs to submit bios of in-place writes on pinned file.

Signed-off-by: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
---
 fs/f2fs/sysfs.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index d18931b7b094..c56e8c873935 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -792,7 +792,8 @@ static ssize_t __sbi_store(struct f2fs_attr *a,
 	if (!strcmp(a->attr.name, "ipu_policy")) {
 		if (t >= BIT(F2FS_IPU_MAX))
 			return -EINVAL;
-		if (t && f2fs_lfs_mode(sbi))
+		/* allow F2FS_IPU_NOCACHE only for IPU in the pinned file */
+		if (f2fs_lfs_mode(sbi) && (t & ~BIT(F2FS_IPU_NOCACHE)))
 			return -EINVAL;
 		SM_I(sbi)->ipu_policy = (unsigned int)t;
 		return count;
-- 
2.46.0.662.g92d0881bb0-goog