[PATCH] fadvise: return ESPIPE on FIFO/pipe

The patch makes posix_fadvise return ESPIPE on FIFO/pipe in order to be
fully POSIX-compliant.

Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/mm/fadvise.c b/mm/fadvise.c
index 5f19e87bc5af..d257c89e7704 100644
--- a/mm/fadvise.c
+++ b/mm/fadvise.c
@@ -37,6 +37,11 @@ asmlinkage long sys_fadvise64_64(int fd, loff_t offset, loff_t len, int advice)
         if (!file)
                 return -EBADF;
 
+        if (S_ISFIFO(file->f_dentry->d_inode->i_mode)) {
+                ret = -ESPIPE;
+                goto out;
+        }
+
         mapping = file->f_mapping;
         if (!mapping || len < 0) {
                 ret = -EINVAL;