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author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-31 02:58:07 +0100 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-31 02:58:07 +0100 |
commit | 168fe32a072a4b8dc81a3aebf0e5e588d38e2955 (patch) | |
tree | 297f0f6192256785979f5ebfb92797f81754548d /ipc | |
parent | Merge branch 'for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/c... (diff) | |
parent | make kernel-side POLL... arch-independent (diff) | |
download | linux-168fe32a072a4b8dc81a3aebf0e5e588d38e2955.tar.xz linux-168fe32a072a4b8dc81a3aebf0e5e588d38e2955.zip |
Merge branch 'misc.poll' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull poll annotations from Al Viro:
"This introduces a __bitwise type for POLL### bitmap, and propagates
the annotations through the tree. Most of that stuff is as simple as
'make ->poll() instances return __poll_t and do the same to local
variables used to hold the future return value'.
Some of the obvious brainos found in process are fixed (e.g. POLLIN
misspelled as POLL_IN). At that point the amount of sparse warnings is
low and most of them are for genuine bugs - e.g. ->poll() instance
deciding to return -EINVAL instead of a bitmap. I hadn't touched those
in this series - it's large enough as it is.
Another problem it has caught was eventpoll() ABI mess; select.c and
eventpoll.c assumed that corresponding POLL### and EPOLL### were
equal. That's true for some, but not all of them - EPOLL### are
arch-independent, but POLL### are not.
The last commit in this series separates userland POLL### values from
the (now arch-independent) kernel-side ones, converting between them
in the few places where they are copied to/from userland. AFAICS, this
is the least disruptive fix preserving poll(2) ABI and making epoll()
work on all architectures.
As it is, it's simply broken on sparc - try to give it EPOLLWRNORM and
it will trigger only on what would've triggered EPOLLWRBAND on other
architectures. EPOLLWRBAND and EPOLLRDHUP, OTOH, are never triggered
at all on sparc. With this patch they should work consistently on all
architectures"
* 'misc.poll' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (37 commits)
make kernel-side POLL... arch-independent
eventpoll: no need to mask the result of epi_item_poll() again
eventpoll: constify struct epoll_event pointers
debugging printk in sg_poll() uses %x to print POLL... bitmap
annotate poll(2) guts
9p: untangle ->poll() mess
->si_band gets POLL... bitmap stored into a user-visible long field
ring_buffer_poll_wait() return value used as return value of ->poll()
the rest of drivers/*: annotate ->poll() instances
media: annotate ->poll() instances
fs: annotate ->poll() instances
ipc, kernel, mm: annotate ->poll() instances
net: annotate ->poll() instances
apparmor: annotate ->poll() instances
tomoyo: annotate ->poll() instances
sound: annotate ->poll() instances
acpi: annotate ->poll() instances
crypto: annotate ->poll() instances
block: annotate ->poll() instances
x86: annotate ->poll() instances
...
Diffstat (limited to 'ipc')
-rw-r--r-- | ipc/mqueue.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/ipc/mqueue.c b/ipc/mqueue.c index 17bc8b874d92..3bc5bb7d6827 100644 --- a/ipc/mqueue.c +++ b/ipc/mqueue.c @@ -519,10 +519,10 @@ static int mqueue_flush_file(struct file *filp, fl_owner_t id) return 0; } -static unsigned int mqueue_poll_file(struct file *filp, struct poll_table_struct *poll_tab) +static __poll_t mqueue_poll_file(struct file *filp, struct poll_table_struct *poll_tab) { struct mqueue_inode_info *info = MQUEUE_I(file_inode(filp)); - int retval = 0; + __poll_t retval = 0; poll_wait(filp, &info->wait_q, poll_tab); |