From: Prasanna Meda <pmeda@akamai.com>
I missed the point that seq_lseek did not reset the f_version, like
generic_lseek did, until Jeremy proved with an example.
Signed-off-by: Prasanna Meda <pmeda@akamai.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---
25-akpm/fs/seq_file.c | 5 +++++
1 files changed, 5 insertions(+)
diff -puN fs/seq_file.c~speedup-proc-pid-maps-fix-fix-fix-fix fs/seq_file.c
--- 25/fs/seq_file.c~speedup-proc-pid-maps-fix-fix-fix-fix 2005-01-16 00:47:02.961287024 -0800
+++ 25-akpm/fs/seq_file.c 2005-01-16 00:47:02.964286568 -0800
@@ -117,6 +117,7 @@ ssize_t seq_read(struct file *file, char
if (!m->buf)
goto Enomem;
m->count = 0;
+ m->version = 0;
}
m->op->stop(m, p);
m->count = 0;
@@ -173,6 +174,7 @@ static int traverse(struct seq_file *m,
int error = 0;
void *p;
+ m->version = 0;
m->index = 0;
m->count = m->from = 0;
if (!offset)
@@ -227,6 +229,7 @@ loff_t seq_lseek(struct file *file, loff
long long retval = -EINVAL;
down(&m->sem);
+ m->version = file->f_version;
switch (origin) {
case 1:
offset += file->f_pos;
@@ -240,6 +243,7 @@ loff_t seq_lseek(struct file *file, loff
if (retval) {
/* with extreme prejudice... */
file->f_pos = 0;
+ m->version = 0;
m->index = 0;
m->count = 0;
} else {
@@ -248,6 +252,7 @@ loff_t seq_lseek(struct file *file, loff
}
}
up(&m->sem);
+ file->f_version = m->version;
return retval;
}
EXPORT_SYMBOL(seq_lseek);
_