summaryrefslogtreecommitdiffstats
path: root/kernel
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2018-01-30 17:58:07 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2018-01-30 17:58:07 -0800
commit168fe32a072a4b8dc81a3aebf0e5e588d38e2955 (patch)
tree297f0f6192256785979f5ebfb92797f81754548d /kernel
parent13ddd1667e7f01071cdf120132238ffca004a88e (diff)
parentc71d227fc4133f949dae620ed5e3a250b43f2415 (diff)
downloadlinux-168fe32a072a4b8dc81a3aebf0e5e588d38e2955.tar.bz2
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 'kernel')
-rw-r--r--kernel/events/core.c4
-rw-r--r--kernel/printk/printk.c4
-rw-r--r--kernel/relay.c4
-rw-r--r--kernel/time/posix-clock.c4
-rw-r--r--kernel/trace/ring_buffer.c2
-rw-r--r--kernel/trace/trace.c6
6 files changed, 12 insertions, 12 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 02f7d6e57d9e..d0d9bfb47d2e 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -4520,11 +4520,11 @@ perf_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
return ret;
}
-static unsigned int perf_poll(struct file *file, poll_table *wait)
+static __poll_t perf_poll(struct file *file, poll_table *wait)
{
struct perf_event *event = file->private_data;
struct ring_buffer *rb;
- unsigned int events = POLLHUP;
+ __poll_t events = POLLHUP;
poll_wait(file, &event->waitq, wait);
diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
index b9006617710f..c2e713f6ae2e 100644
--- a/kernel/printk/printk.c
+++ b/kernel/printk/printk.c
@@ -920,10 +920,10 @@ static loff_t devkmsg_llseek(struct file *file, loff_t offset, int whence)
return ret;
}
-static unsigned int devkmsg_poll(struct file *file, poll_table *wait)
+static __poll_t devkmsg_poll(struct file *file, poll_table *wait)
{
struct devkmsg_user *user = file->private_data;
- int ret = 0;
+ __poll_t ret = 0;
if (!user)
return POLLERR|POLLNVAL;
diff --git a/kernel/relay.c b/kernel/relay.c
index 39a9dfc69486..41280033a4c5 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -919,9 +919,9 @@ static int relay_file_mmap(struct file *filp, struct vm_area_struct *vma)
*
* Poll implemention.
*/
-static unsigned int relay_file_poll(struct file *filp, poll_table *wait)
+static __poll_t relay_file_poll(struct file *filp, poll_table *wait)
{
- unsigned int mask = 0;
+ __poll_t mask = 0;
struct rchan_buf *buf = filp->private_data;
if (buf->finalized)
diff --git a/kernel/time/posix-clock.c b/kernel/time/posix-clock.c
index cc91d90abd84..94ad46d50b56 100644
--- a/kernel/time/posix-clock.c
+++ b/kernel/time/posix-clock.c
@@ -68,10 +68,10 @@ static ssize_t posix_clock_read(struct file *fp, char __user *buf,
return err;
}
-static unsigned int posix_clock_poll(struct file *fp, poll_table *wait)
+static __poll_t posix_clock_poll(struct file *fp, poll_table *wait)
{
struct posix_clock *clk = get_posix_clock(fp);
- unsigned int result = 0;
+ __poll_t result = 0;
if (!clk)
return POLLERR;
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 5af2842dea96..ca6930e0d25e 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -630,7 +630,7 @@ int ring_buffer_wait(struct ring_buffer *buffer, int cpu, bool full)
* Returns POLLIN | POLLRDNORM if data exists in the buffers,
* zero otherwise.
*/
-int ring_buffer_poll_wait(struct ring_buffer *buffer, int cpu,
+__poll_t ring_buffer_poll_wait(struct ring_buffer *buffer, int cpu,
struct file *filp, poll_table *poll_table)
{
struct ring_buffer_per_cpu *cpu_buffer;
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 4f3a8e24b426..32c069bbf41b 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -5616,7 +5616,7 @@ static int tracing_release_pipe(struct inode *inode, struct file *file)
return 0;
}
-static unsigned int
+static __poll_t
trace_poll(struct trace_iterator *iter, struct file *filp, poll_table *poll_table)
{
struct trace_array *tr = iter->tr;
@@ -5635,7 +5635,7 @@ trace_poll(struct trace_iterator *iter, struct file *filp, poll_table *poll_tabl
filp, poll_table);
}
-static unsigned int
+static __poll_t
tracing_poll_pipe(struct file *filp, poll_table *poll_table)
{
struct trace_iterator *iter = filp->private_data;
@@ -6589,7 +6589,7 @@ static int tracing_buffers_open(struct inode *inode, struct file *filp)
return ret;
}
-static unsigned int
+static __poll_t
tracing_buffers_poll(struct file *filp, poll_table *poll_table)
{
struct ftrace_buffer_info *info = filp->private_data;