diff options
| author | Alexey Dobriyan <adobriyan@gmail.com> | 2007-09-12 02:23:55 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-09-12 04:21:20 +0400 |
| commit | dd23aae4f5edf4e1dbd8f7f8013a754ba3253f48 (patch) | |
| tree | c7babf45f8132876e8a715f0327cf480c05c6131 /include/linux/poll.h | |
| parent | 3210f0ecdba6a81c3f8efe6f442d2e1f57db98f9 (diff) | |
| download | linux-dd23aae4f5edf4e1dbd8f7f8013a754ba3253f48.tar.xz | |
Fix select on /proc files without ->poll
Taneli Vähäkangas <vahakang@cs.helsinki.fi> reported that commit
786d7e1612f0b0adb6046f19b906609e4fe8b1ba aka "Fix rmmod/read/write races
in /proc entries" broke SBCL + SLIME combo.
The old code in do_select() used DEFAULT_POLLMASK, if couldn't find
->poll handler. The new code makes ->poll always there and returns 0 by
default, which is not correct. Return DEFAULT_POLLMASK instead.
Steps to reproduce:
install emacs, SBCL, SLIME
emacs
M-x slime in *inferior-lisp* buffer
[watch it doing "Connecting to Swank on port X.."]
Please, apply before 2.6.23.
P.S.: why SBCL can't just read(2) /proc/cpuinfo is a mystery.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: T Taneli Vahakangas <vahakang@cs.helsinki.fi>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/poll.h')
| -rw-r--r-- | include/linux/poll.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/poll.h b/include/linux/poll.h index 27690798623f..16d813b364ef 100644 --- a/include/linux/poll.h +++ b/include/linux/poll.h @@ -21,6 +21,8 @@ #define WQUEUES_STACK_ALLOC (MAX_STACK_ALLOC - FRONTEND_STACK_ALLOC) #define N_INLINE_POLL_ENTRIES (WQUEUES_STACK_ALLOC / sizeof(struct poll_table_entry)) +#define DEFAULT_POLLMASK (POLLIN | POLLOUT | POLLRDNORM | POLLWRNORM) + struct poll_table_struct; /* |