take care to handle NULL ->proc_lseek()

Easily done now, just by clearing FMODE_LSEEK in ->f_mode
during proc_reg_open() for such entries.

Fixes: c197c5472a32 "fs: remove no_llseek"
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index f130499ad8432db69e1b728d2edae0ac99e4f632..f495fdb391517a607dff7dbc495a7a50d83189a2 100644 (file)
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -494,6 +494,9 @@ static int proc_reg_open(struct inode *inode, struct file *file)
        typeof_member(struct proc_ops, proc_release) release;
        struct pde_opener *pdeo;
 
+       if (!pde->proc_ops->proc_lseek)
+               file->f_mode &= ~FMODE_LSEEK;
+
        if (pde_is_permanent(pde)) {
                open = pde->proc_ops->proc_open;
                if (open)