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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 /drivers/media/common
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 'drivers/media/common')
-rw-r--r--drivers/media/common/saa7146/saa7146_fops.c8
-rw-r--r--drivers/media/common/siano/smsdvb-debugfs.c7
2 files changed, 6 insertions, 9 deletions
diff --git a/drivers/media/common/saa7146/saa7146_fops.c b/drivers/media/common/saa7146/saa7146_fops.c
index 8c87d6837c49..8ee3eebef4db 100644
--- a/drivers/media/common/saa7146/saa7146_fops.c
+++ b/drivers/media/common/saa7146/saa7146_fops.c
@@ -320,13 +320,13 @@ static int fops_mmap(struct file *file, struct vm_area_struct * vma)
return res;
}
-static unsigned int __fops_poll(struct file *file, struct poll_table_struct *wait)
+static __poll_t __fops_poll(struct file *file, struct poll_table_struct *wait)
{
struct video_device *vdev = video_devdata(file);
struct saa7146_fh *fh = file->private_data;
struct videobuf_buffer *buf = NULL;
struct videobuf_queue *q;
- unsigned int res = v4l2_ctrl_poll(file, wait);
+ __poll_t res = v4l2_ctrl_poll(file, wait);
DEB_EE("file:%p, poll:%p\n", file, wait);
@@ -359,10 +359,10 @@ static unsigned int __fops_poll(struct file *file, struct poll_table_struct *wai
return res;
}
-static unsigned int fops_poll(struct file *file, struct poll_table_struct *wait)
+static __poll_t fops_poll(struct file *file, struct poll_table_struct *wait)
{
struct video_device *vdev = video_devdata(file);
- unsigned int res;
+ __poll_t res;
mutex_lock(vdev->lock);
res = __fops_poll(file, wait);
diff --git a/drivers/media/common/siano/smsdvb-debugfs.c b/drivers/media/common/siano/smsdvb-debugfs.c
index 1a8677ade391..0c0878bcf251 100644
--- a/drivers/media/common/siano/smsdvb-debugfs.c
+++ b/drivers/media/common/siano/smsdvb-debugfs.c
@@ -374,7 +374,7 @@ exit:
return rc;
}
-static unsigned int smsdvb_stats_poll(struct file *file, poll_table *wait)
+static __poll_t smsdvb_stats_poll(struct file *file, poll_table *wait)
{
struct smsdvb_debugfs *debug_data = file->private_data;
int rc;
@@ -384,12 +384,9 @@ static unsigned int smsdvb_stats_poll(struct file *file, poll_table *wait)
poll_wait(file, &debug_data->stats_queue, wait);
rc = smsdvb_stats_wait_read(debug_data);
- if (rc > 0)
- rc = POLLIN | POLLRDNORM;
-
kref_put(&debug_data->refcount, smsdvb_debugfs_data_release);
- return rc;
+ return rc > 0 ? POLLIN | POLLRDNORM : 0;
}
static ssize_t smsdvb_stats_read(struct file *file, char __user *user_buf,