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authorLinus Torvalds <torvalds@linux-foundation.org>2018-01-31 04:58:07 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-01-31 04:58:07 +0300
commit168fe32a072a4b8dc81a3aebf0e5e588d38e2955 (patch)
tree297f0f6192256785979f5ebfb92797f81754548d /fs/fuse
parent13ddd1667e7f01071cdf120132238ffca004a88e (diff)
parentc71d227fc4133f949dae620ed5e3a250b43f2415 (diff)
downloadlinux-168fe32a072a4b8dc81a3aebf0e5e588d38e2955.tar.xz
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.c4
-rw-r--r--fs/fuse/file.c6
-rw-r--r--fs/fuse/fuse_i.h2
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);