diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-30 17:58:07 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-01-30 17:58:07 -0800 |
commit | 168fe32a072a4b8dc81a3aebf0e5e588d38e2955 (patch) | |
tree | 297f0f6192256785979f5ebfb92797f81754548d /fs/fuse | |
parent | 13ddd1667e7f01071cdf120132238ffca004a88e (diff) | |
parent | c71d227fc4133f949dae620ed5e3a250b43f2415 (diff) | |
download | linux-next-168fe32a072a4b8dc81a3aebf0e5e588d38e2955.tar.gz |
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 'fs/fuse')
-rw-r--r-- | fs/fuse/dev.c | 4 | ||||
-rw-r--r-- | fs/fuse/file.c | 6 | ||||
-rw-r--r-- | fs/fuse/fuse_i.h | 2 |
3 files changed, 6 insertions, 6 deletions
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index 17f0d05bfd4c..aa089a6925d0 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -2004,9 +2004,9 @@ out: return ret; } -static unsigned fuse_dev_poll(struct file *file, poll_table *wait) +static __poll_t fuse_dev_poll(struct file *file, poll_table *wait) { - unsigned mask = POLLOUT | POLLWRNORM; + __poll_t mask = POLLOUT | POLLWRNORM; struct fuse_iqueue *fiq; struct fuse_dev *fud = fuse_get_dev(file); diff --git a/fs/fuse/file.c b/fs/fuse/file.c index cb7dff5c45d7..e85e974dd211 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -2751,7 +2751,7 @@ static void fuse_register_polled_file(struct fuse_conn *fc, spin_unlock(&fc->lock); } -unsigned fuse_file_poll(struct file *file, poll_table *wait) +__poll_t fuse_file_poll(struct file *file, poll_table *wait) { struct fuse_file *ff = file->private_data; struct fuse_conn *fc = ff->fc; @@ -2764,7 +2764,7 @@ unsigned fuse_file_poll(struct file *file, poll_table *wait) return DEFAULT_POLLMASK; poll_wait(file, &ff->poll_wait, wait); - inarg.events = (__u32)poll_requested_events(wait); + inarg.events = mangle_poll(poll_requested_events(wait)); /* * Ask for notification iff there's someone waiting for it. @@ -2786,7 +2786,7 @@ unsigned fuse_file_poll(struct file *file, poll_table *wait) err = fuse_simple_request(fc, &args); if (!err) - return outarg.revents; + return demangle_poll(outarg.revents); if (err == -ENOSYS) { fc->no_poll = 1; return DEFAULT_POLLMASK; diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index d5773ca67ad2..c4c093bbf456 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -951,7 +951,7 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, unsigned int flags); long fuse_ioctl_common(struct file *file, unsigned int cmd, unsigned long arg, unsigned int flags); -unsigned fuse_file_poll(struct file *file, poll_table *wait); +__poll_t fuse_file_poll(struct file *file, poll_table *wait); int fuse_dev_release(struct inode *inode, struct file *file); bool fuse_write_update_size(struct inode *inode, loff_t pos); |