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
  ...

33 files changed, 165 insertions, 67 deletions

diff --git a/arch/alpha/include/uapi/asm/Kbuild b/arch/alpha/include/uapi/asm/Kbuild
index 14a2e9af97e9..9afaba5e5503 100644
--- a/arch/alpha/include/uapi/asm/Kbuild
+++ b/arch/alpha/include/uapi/asm/Kbuild
@@ -2,3 +2,4 @@
 include include/uapi/asm-generic/Kbuild.asm
 
 generic-y += bpf_perf_event.h
+generic-y += poll.h
diff --git a/arch/alpha/include/uapi/asm/poll.h b/arch/alpha/include/uapi/asm/poll.h
deleted file mode 100644
index b7132a305a47..000000000000
--- a/arch/alpha/include/uapi/asm/poll.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#include <asm-generic/poll.h>
diff --git a/arch/blackfin/include/uapi/asm/poll.h b/arch/blackfin/include/uapi/asm/poll.h
index 8b094d43e9b7..3b162f2d2970 100644
--- a/arch/blackfin/include/uapi/asm/poll.h
+++ b/arch/blackfin/include/uapi/asm/poll.h
@@ -9,8 +9,25 @@
 #ifndef _UAPI__BFIN_POLL_H
 #define _UAPI__BFIN_POLL_H
 
-#define POLLWRNORM	4 /* POLLOUT */
-#define POLLWRBAND	256
+#ifndef __KERNEL__
+#define POLLWRNORM	POLLOUT
+#define POLLWRBAND	(__force __poll_t)256
+#else
+#define __ARCH_HAS_MANGLED_POLL
+static inline __u16 mangle_poll(__poll_t val)
+{
+	__u16 v = (__force __u16)val;
+	/* bit 9 -> bit 8, bit 8 -> bit 2 */
+	return (v & ~0x300) | ((v & 0x200) >> 1) | ((v & 0x100) >> 6);
+}
+
+static inline __poll_t demangle_poll(__u16 v)
+{
+        /* bit 8 -> bit 9, bit 2 -> bits 2 and 8 */
+	return (__force __poll_t)((v & ~0x100) | ((v & 0x100) << 1) |
+				((v & 4) << 6));
+}
+#endif
 
 #include <asm-generic/poll.h>
 
diff --git a/arch/cris/arch-v10/drivers/gpio.c b/arch/cris/arch-v10/drivers/gpio.c
index 68dbe261dc57..a2986c60aaac 100644
--- a/arch/cris/arch-v10/drivers/gpio.c
+++ b/arch/cris/arch-v10/drivers/gpio.c
@@ -50,7 +50,7 @@ static ssize_t gpio_write(struct file *file, const char __user *buf,
 	size_t count, loff_t *off);
 static int gpio_open(struct inode *inode, struct file *filp);
 static int gpio_release(struct inode *inode, struct file *filp);
-static unsigned int gpio_poll(struct file *filp, struct poll_table_struct *wait);
+static __poll_t gpio_poll(struct file *filp, struct poll_table_struct *wait);
 
 /* private data per open() of this driver */
 
@@ -141,9 +141,9 @@ static unsigned long dir_g_shadow; /* 1=output */
 #define USE_PORTS(priv) ((priv)->minor <= GPIO_MINOR_B)
 
 
-static unsigned int gpio_poll(struct file *file, poll_table *wait)
+static __poll_t gpio_poll(struct file *file, poll_table *wait)
 {
-	unsigned int mask = 0;
+	__poll_t mask = 0;
 	struct gpio_private *priv = file->private_data;
 	unsigned long data;
 	unsigned long flags;
diff --git a/arch/cris/arch-v10/drivers/sync_serial.c b/arch/cris/arch-v10/drivers/sync_serial.c
index cfe9176f2205..177843c64071 100644
--- a/arch/cris/arch-v10/drivers/sync_serial.c
+++ b/arch/cris/arch-v10/drivers/sync_serial.c
@@ -157,7 +157,7 @@ static inline int sync_data_avail(struct sync_port *port);
 
 static int sync_serial_open(struct inode *inode, struct file *file);
 static int sync_serial_release(struct inode *inode, struct file *file);
-static unsigned int sync_serial_poll(struct file *filp, poll_table *wait);
+static __poll_t sync_serial_poll(struct file *filp, poll_table *wait);
 
 static long sync_serial_ioctl(struct file *file,
 	unsigned int cmd, unsigned long arg);
@@ -654,12 +654,12 @@ static int sync_serial_release(struct inode *inode, struct file *file)
 
 
 
-static unsigned int sync_serial_poll(struct file *file, poll_table *wait)
+static __poll_t sync_serial_poll(struct file *file, poll_table *wait)
 {
 	int dev = MINOR(file_inode(file)->i_rdev);
-	unsigned int mask = 0;
+	__poll_t mask = 0;
 	struct sync_port *port;
-	DEBUGPOLL(static unsigned int prev_mask = 0);
+	DEBUGPOLL(static __poll_t prev_mask = 0);
 
 	port = &ports[dev];
 	poll_wait(file, &port->out_wait_q, wait);
diff --git a/arch/cris/arch-v32/drivers/sync_serial.c b/arch/cris/arch-v32/drivers/sync_serial.c
index 8efcc1a899a8..e20e0b9a3a5c 100644
--- a/arch/cris/arch-v32/drivers/sync_serial.c
+++ b/arch/cris/arch-v32/drivers/sync_serial.c
@@ -178,7 +178,7 @@ static inline int sync_data_avail(struct sync_port *port);
 
 static int sync_serial_open(struct inode *, struct file *);
 static int sync_serial_release(struct inode *, struct file *);
-static unsigned int sync_serial_poll(struct file *filp, poll_table *wait);
+static __poll_t sync_serial_poll(struct file *filp, poll_table *wait);
 
 static long sync_serial_ioctl(struct file *file,
 			      unsigned int cmd, unsigned long arg);
@@ -555,13 +555,13 @@ static int sync_serial_release(struct inode *inode, struct file *file)
 	return 0;
 }
 
-static unsigned int sync_serial_poll(struct file *file, poll_table *wait)
+static __poll_t sync_serial_poll(struct file *file, poll_table *wait)
 {
 	int dev = iminor(file_inode(file));
-	unsigned int mask = 0;
+	__poll_t mask = 0;
 	struct sync_port *port;
 	DEBUGPOLL(
-	static unsigned int prev_mask;
+	static __poll_t prev_mask;
 	);
 
 	port = &ports[dev];
diff --git a/arch/frv/include/uapi/asm/poll.h b/arch/frv/include/uapi/asm/poll.h
index 887b67288340..a44c8f0ebee7 100644
--- a/arch/frv/include/uapi/asm/poll.h
+++ b/arch/frv/include/uapi/asm/poll.h
@@ -2,12 +2,27 @@
 #ifndef _ASM_POLL_H
 #define _ASM_POLL_H
 
+#ifndef __KERNEL__
 #define POLLWRNORM	POLLOUT
-#define POLLWRBAND	256
+#define POLLWRBAND	(__force __poll_t)256
+#else
+#define __ARCH_HAS_MANGLED_POLL
+static inline __u16 mangle_poll(__poll_t val)
+{
+	__u16 v = (__force __u16)val;
+	/* bit 9 -> bit 8, bit 8 -> bit 2 */
+	return (v & ~0x300) | ((v & 0x200) >> 1) | ((v & 0x100) >> 6);
+}
 
-#include <asm-generic/poll.h>
+static inline __poll_t demangle_poll(__u16 v)
+{
+        /* bit 8 -> bit 9, bit 2 -> bits 2 and 8 */
+	return (__force __poll_t)((v & ~0x100) | ((v & 0x100) << 1) |
+				((v & 4) << 6));
+}
+#endif
 
+#include <asm-generic/poll.h>
 #undef POLLREMOVE
 
 #endif
-
diff --git a/arch/ia64/include/uapi/asm/Kbuild b/arch/ia64/include/uapi/asm/Kbuild
index f5c6967a93bb..c0527cfc48f0 100644
--- a/arch/ia64/include/uapi/asm/Kbuild
+++ b/arch/ia64/include/uapi/asm/Kbuild
@@ -3,3 +3,4 @@ include include/uapi/asm-generic/Kbuild.asm
 
 generic-y += bpf_perf_event.h
 generic-y += kvm_para.h
+generic-y += poll.h
diff --git a/arch/ia64/include/uapi/asm/poll.h b/arch/ia64/include/uapi/asm/poll.h
deleted file mode 100644
index b7132a305a47..000000000000
--- a/arch/ia64/include/uapi/asm/poll.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#include <asm-generic/poll.h>
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 09f86ebfcc7b..c44f002e8f6b 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -1644,12 +1644,12 @@ pfm_write(struct file *file, const char __user *ubuf,
 	return -EINVAL;
 }
 
-static unsigned int
+static __poll_t
 pfm_poll(struct file *filp, poll_table * wait)
 {
 	pfm_context_t *ctx;
 	unsigned long flags;
-	unsigned int mask = 0;
+	__poll_t mask = 0;
 
 	if (PFM_IS_FILE(filp) == 0) {
 		printk(KERN_ERR "perfmon: pfm_poll: bad magic [%d]\n", task_pid_nr(current));
diff --git a/arch/m32r/include/uapi/asm/Kbuild b/arch/m32r/include/uapi/asm/Kbuild
index 451bf6071c6e..c3df55aeefe7 100644
--- a/arch/m32r/include/uapi/asm/Kbuild
+++ b/arch/m32r/include/uapi/asm/Kbuild
@@ -3,4 +3,5 @@ include include/uapi/asm-generic/Kbuild.asm
 
 generic-y += bpf_perf_event.h
 generic-y += kvm_para.h
+generic-y += poll.h
 generic-y += siginfo.h
diff --git a/arch/m32r/include/uapi/asm/poll.h b/arch/m32r/include/uapi/asm/poll.h
deleted file mode 100644
index b7132a305a47..000000000000
--- a/arch/m32r/include/uapi/asm/poll.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#include <asm-generic/poll.h>
diff --git a/arch/m68k/include/uapi/asm/poll.h b/arch/m68k/include/uapi/asm/poll.h
index c3e3fcc15e1d..d8be239e8141 100644
--- a/arch/m68k/include/uapi/asm/poll.h
+++ b/arch/m68k/include/uapi/asm/poll.h
@@ -2,8 +2,25 @@
 #ifndef __m68k_POLL_H
 #define __m68k_POLL_H
 
+#ifndef __KERNEL__
 #define POLLWRNORM	POLLOUT
-#define POLLWRBAND	256
+#define POLLWRBAND	(__force __poll_t)256
+#else
+#define __ARCH_HAS_MANGLED_POLL
+static inline __u16 mangle_poll(__poll_t val)
+{
+	__u16 v = (__force __u16)val;
+	/* bit 9 -> bit 8, bit 8 -> bit 2 */
+	return (v & ~0x300) | ((v & 0x200) >> 1) | ((v & 0x100) >> 6);
+}
+
+static inline __poll_t demangle_poll(__u16 v)
+{
+        /* bit 8 -> bit 9, bit 2 -> bits 2 and 8 */
+	return (__force __poll_t)((v & ~0x100) | ((v & 0x100) << 1) |
+				((v & 4) << 6));
+}
+#endif
 
 #include <asm-generic/poll.h>
 
diff --git a/arch/mips/include/uapi/asm/poll.h b/arch/mips/include/uapi/asm/poll.h
index ad289d7b7434..3173f8917128 100644
--- a/arch/mips/include/uapi/asm/poll.h
+++ b/arch/mips/include/uapi/asm/poll.h
@@ -2,8 +2,25 @@
 #ifndef __ASM_POLL_H
 #define __ASM_POLL_H
 
+#ifndef __KERNEL__
 #define POLLWRNORM	POLLOUT
-#define POLLWRBAND	0x0100
+#define POLLWRBAND	(__force __poll_t)0x0100
+#else
+#define __ARCH_HAS_MANGLED_POLL
+static inline __u16 mangle_poll(__poll_t val)
+{
+	__u16 v = (__force __u16)val;
+	/* bit 9 -> bit 8, bit 8 -> bit 2 */
+	return (v & ~0x300) | ((v & 0x200) >> 1) | ((v & 0x100) >> 6);
+}
+
+static inline __poll_t demangle_poll(__u16 v)
+{
+        /* bit 8 -> bit 9, bit 2 -> bits 2 and 8 */
+	return (__force __poll_t)((v & ~0x100) | ((v & 0x100) << 1) |
+				((v & 4) << 6));
+}
+#endif
 
 #include <asm-generic/poll.h>
 
diff --git a/arch/mips/kernel/rtlx.c b/arch/mips/kernel/rtlx.c
index b80dd8b17a76..bbb0f4770c0d 100644
--- a/arch/mips/kernel/rtlx.c
+++ b/arch/mips/kernel/rtlx.c
@@ -336,10 +336,10 @@ static int file_release(struct inode *inode, struct file *filp)
 	return rtlx_release(iminor(inode));
 }
 
-static unsigned int file_poll(struct file *file, poll_table *wait)
+static __poll_t file_poll(struct file *file, poll_table *wait)
 {
 	int minor = iminor(file_inode(file));
-	unsigned int mask = 0;
+	__poll_t mask = 0;
 
 	poll_wait(file, &channel_wqs[minor].rt_queue, wait);
 	poll_wait(file, &channel_wqs[minor].lx_queue, wait);
diff --git a/arch/mn10300/include/uapi/asm/Kbuild b/arch/mn10300/include/uapi/asm/Kbuild
index 81271d3af47c..b04fd1632051 100644
--- a/arch/mn10300/include/uapi/asm/Kbuild
+++ b/arch/mn10300/include/uapi/asm/Kbuild
@@ -2,4 +2,5 @@
 include include/uapi/asm-generic/Kbuild.asm
 
 generic-y	+= bpf_perf_event.h
+generic-y	+= poll.h
 generic-y	+= siginfo.h
diff --git a/arch/mn10300/include/uapi/asm/poll.h b/arch/mn10300/include/uapi/asm/poll.h
deleted file mode 100644
index b7132a305a47..000000000000
--- a/arch/mn10300/include/uapi/asm/poll.h
+++ /dev/null
@@ -1,2 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#include <asm-generic/poll.h>
diff --git a/arch/powerpc/kernel/rtasd.c b/arch/powerpc/kernel/rtasd.c
index 0f0b1b2f3b60..1da8b7d8c6ca 100644
--- a/arch/powerpc/kernel/rtasd.c
+++ b/arch/powerpc/kernel/rtasd.c
@@ -388,7 +388,7 @@ out:
 	return error;
 }
 
-static unsigned int rtas_log_poll(struct file *file, poll_table * wait)
+static __poll_t rtas_log_poll(struct file *file, poll_table * wait)
 {
 	poll_wait(file, &rtas_log_wait, wait);
 	if (rtas_log_size)
diff --git a/arch/powerpc/platforms/cell/spufs/backing_ops.c b/arch/powerpc/platforms/cell/spufs/backing_ops.c
index 6e8a9ef8590e..1a9a756b0b2f 100644
--- a/arch/powerpc/platforms/cell/spufs/backing_ops.c
+++ b/arch/powerpc/platforms/cell/spufs/backing_ops.c
@@ -86,10 +86,10 @@ static u32 spu_backing_mbox_stat_read(struct spu_context *ctx)
 	return ctx->csa.prob.mb_stat_R;
 }
 
-static unsigned int spu_backing_mbox_stat_poll(struct spu_context *ctx,
-					  unsigned int events)
+static __poll_t spu_backing_mbox_stat_poll(struct spu_context *ctx,
+					  __poll_t events)
 {
-	int ret;
+	__poll_t ret;
 	u32 stat;
 
 	ret = 0;
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
index 5ffcdeb1eb17..fc7772c3d068 100644
--- a/arch/powerpc/platforms/cell/spufs/file.c
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -762,10 +762,10 @@ out:
 	return count;
 }
 
-static unsigned int spufs_ibox_poll(struct file *file, poll_table *wait)
+static __poll_t spufs_ibox_poll(struct file *file, poll_table *wait)
 {
 	struct spu_context *ctx = file->private_data;
-	unsigned int mask;
+	__poll_t mask;
 
 	poll_wait(file, &ctx->ibox_wq, wait);
 
@@ -898,10 +898,10 @@ out:
 	return count;
 }
 
-static unsigned int spufs_wbox_poll(struct file *file, poll_table *wait)
+static __poll_t spufs_wbox_poll(struct file *file, poll_table *wait)
 {
 	struct spu_context *ctx = file->private_data;
-	unsigned int mask;
+	__poll_t mask;
 
 	poll_wait(file, &ctx->wbox_wq, wait);
 
@@ -1690,11 +1690,11 @@ out:
 	return ret;
 }
 
-static unsigned int spufs_mfc_poll(struct file *file,poll_table *wait)
+static __poll_t spufs_mfc_poll(struct file *file,poll_table *wait)
 {
 	struct spu_context *ctx = file->private_data;
 	u32 free_elements, tagstatus;
-	unsigned int mask;
+	__poll_t mask;
 
 	poll_wait(file, &ctx->mfc_wq, wait);
 
@@ -2455,11 +2455,11 @@ static ssize_t spufs_switch_log_read(struct file *file, char __user *buf,
 	return cnt == 0 ? error : cnt;
 }
 
-static unsigned int spufs_switch_log_poll(struct file *file, poll_table *wait)
+static __poll_t spufs_switch_log_poll(struct file *file, poll_table *wait)
 {
 	struct inode *inode = file_inode(file);
 	struct spu_context *ctx = SPUFS_I(inode)->i_ctx;
-	unsigned int mask = 0;
+	__poll_t mask = 0;
 	int rc;
 
 	poll_wait(file, &ctx->switch_log->wait, wait);
diff --git a/arch/powerpc/platforms/cell/spufs/hw_ops.c b/arch/powerpc/platforms/cell/spufs/hw_ops.c
index 8655c4cbefc2..fff58198b5b6 100644
--- a/arch/powerpc/platforms/cell/spufs/hw_ops.c
+++ b/arch/powerpc/platforms/cell/spufs/hw_ops.c
@@ -56,11 +56,10 @@ static u32 spu_hw_mbox_stat_read(struct spu_context *ctx)
 	return in_be32(&ctx->spu->problem->mb_stat_R);
 }
 
-static unsigned int spu_hw_mbox_stat_poll(struct spu_context *ctx,
-					  unsigned int events)
+static __poll_t spu_hw_mbox_stat_poll(struct spu_context *ctx, __poll_t events)
 {
 	struct spu *spu = ctx->spu;
-	int ret = 0;
+	__poll_t ret = 0;
 	u32 stat;
 
 	spin_lock_irq(&spu->register_lock);
diff --git a/arch/powerpc/platforms/cell/spufs/spufs.h b/arch/powerpc/platforms/cell/spufs/spufs.h
index 5e59f80e95db..2d0479ad3af4 100644
--- a/arch/powerpc/platforms/cell/spufs/spufs.h
+++ b/arch/powerpc/platforms/cell/spufs/spufs.h
@@ -185,8 +185,7 @@ struct mfc_dma_command {
 struct spu_context_ops {
 	int (*mbox_read) (struct spu_context * ctx, u32 * data);
 	 u32(*mbox_stat_read) (struct spu_context * ctx);
-	unsigned int (*mbox_stat_poll)(struct spu_context *ctx,
-					unsigned int events);
+	__poll_t (*mbox_stat_poll)(struct spu_context *ctx, __poll_t events);
 	int (*ibox_read) (struct spu_context * ctx, u32 * data);
 	int (*wbox_write) (struct spu_context * ctx, u32 data);
 	 u32(*signal1_read) (struct spu_context * ctx);
diff --git a/arch/powerpc/platforms/powernv/opal-prd.c b/arch/powerpc/platforms/powernv/opal-prd.c
index de4dd09f4a15..c18de0a9b1bd 100644
--- a/arch/powerpc/platforms/powernv/opal-prd.c
+++ b/arch/powerpc/platforms/powernv/opal-prd.c
@@ -147,7 +147,7 @@ static bool opal_msg_queue_empty(void)
 	return ret;
 }
 
-static unsigned int opal_prd_poll(struct file *file,
+static __poll_t opal_prd_poll(struct file *file,
 		struct poll_table_struct *wait)
 {
 	poll_wait(file, &opal_prd_msg_wait, wait);
diff --git a/arch/score/include/uapi/asm/Kbuild b/arch/score/include/uapi/asm/Kbuild
index 81271d3af47c..b04fd1632051 100644
--- a/arch/score/include/uapi/asm/Kbuild
+++ b/arch/score/include/uapi/asm/Kbuild
@@ -2,4 +2,5 @@
 include include/uapi/asm-generic/Kbuild.asm
 
 generic-y	+= bpf_perf_event.h
+generic-y	+= poll.h
 generic-y	+= siginfo.h
diff --git a/arch/score/include/uapi/asm/poll.h b/arch/score/include/uapi/asm/poll.h
deleted file mode 100644
index c636b85843cd..000000000000
--- a/arch/score/include/uapi/asm/poll.h
+++ /dev/null
@@ -1,7 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#ifndef _ASM_SCORE_POLL_H
-#define _ASM_SCORE_POLL_H
-
-#include <asm-generic/poll.h>
-
-#endif /* _ASM_SCORE_POLL_H */
diff --git a/arch/sparc/include/uapi/asm/poll.h b/arch/sparc/include/uapi/asm/poll.h
index 72356c999125..2a81e79aa3ea 100644
--- a/arch/sparc/include/uapi/asm/poll.h
+++ b/arch/sparc/include/uapi/asm/poll.h
@@ -2,11 +2,31 @@
 #ifndef __SPARC_POLL_H
 #define __SPARC_POLL_H
 
+#ifndef __KERNEL__
 #define POLLWRNORM	POLLOUT
-#define POLLWRBAND	256
-#define POLLMSG		512
-#define POLLREMOVE	1024
-#define POLLRDHUP       2048
+#define POLLWRBAND	(__force __poll_t)256
+#define POLLMSG		(__force __poll_t)512
+#define POLLREMOVE	(__force __poll_t)1024
+#define POLLRDHUP       (__force __poll_t)2048
+#else
+#define __ARCH_HAS_MANGLED_POLL
+static inline __u16 mangle_poll(__poll_t val)
+{
+	__u16 v = (__force __u16)val;
+        /* bit 9 -> bit 8, bit 8 -> bit 2, bit 13 -> bit 11 */
+	return (v & ~0x300) | ((v & 0x200) >> 1) | ((v & 0x100) >> 6) |
+				((v & 0x2000) >> 2);
+
+
+}
+
+static inline __poll_t demangle_poll(__u16 v)
+{
+        /* bit 8 -> bit 9, bit 2 -> bits 2 and 8 */
+	return (__force __poll_t)((v & ~0x100) | ((v & 0x100) << 1) |
+				((v & 4) << 6) | ((v & 0x800) << 2));
+}
+#endif
 
 #include <asm-generic/poll.h>
 
diff --git a/arch/um/Makefile b/arch/um/Makefile
index b76fcce397a1..e54dda8a0363 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -116,8 +116,15 @@ endef
 KBUILD_KCONFIG := $(HOST_DIR)/um/Kconfig
 
 archheaders:
+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
+	            kbuild-file=$(HOST_DIR)/include/asm/Kbuild \
+		    obj=$(HOST_DIR)/include/generated/asm
+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
+	            kbuild-file=$(HOST_DIR)/include/uapi/asm/Kbuild \
+		    obj=$(HOST_DIR)/include/generated/uapi/asm
 	$(Q)$(MAKE) KBUILD_SRC= ARCH=$(HEADER_ARCH) archheaders
 
+
 archprepare: include/generated/user_constants.h
 
 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
diff --git a/arch/um/drivers/hostaudio_kern.c b/arch/um/drivers/hostaudio_kern.c
index 12bdb5996bf5..7f9dbdbc4eb7 100644
--- a/arch/um/drivers/hostaudio_kern.c
+++ b/arch/um/drivers/hostaudio_kern.c
@@ -119,10 +119,10 @@ static ssize_t hostaudio_write(struct file *file, const char __user *buffer,
 	return err;
 }
 
-static unsigned int hostaudio_poll(struct file *file,
-				   struct poll_table_struct *wait)
+static __poll_t hostaudio_poll(struct file *file,
+				struct poll_table_struct *wait)
 {
-	unsigned int mask = 0;
+	__poll_t mask = 0;
 
 #ifdef DEBUG
 	printk(KERN_DEBUG "hostaudio: poll called (unimplemented)\n");
diff --git a/arch/x86/include/uapi/asm/Kbuild b/arch/x86/include/uapi/asm/Kbuild
index 1e901e421f2d..322681622d1e 100644
--- a/arch/x86/include/uapi/asm/Kbuild
+++ b/arch/x86/include/uapi/asm/Kbuild
@@ -5,3 +5,4 @@ generic-y += bpf_perf_event.h
 generated-y += unistd_32.h
 generated-y += unistd_64.h
 generated-y += unistd_x32.h
+generic-y += poll.h
diff --git a/arch/x86/include/uapi/asm/poll.h b/arch/x86/include/uapi/asm/poll.h
deleted file mode 100644
index c98509d3149e..000000000000
--- a/arch/x86/include/uapi/asm/poll.h
+++ /dev/null
@@ -1 +0,0 @@
-#include <asm-generic/poll.h>
diff --git a/arch/x86/kernel/apm_32.c b/arch/x86/kernel/apm_32.c
index e4b0d92b3ae0..ab1865342002 100644
--- a/arch/x86/kernel/apm_32.c
+++ b/arch/x86/kernel/apm_32.c
@@ -1506,7 +1506,7 @@ static ssize_t do_read(struct file *fp, char __user *buf, size_t count, loff_t *
 	return 0;
 }
 
-static unsigned int do_poll(struct file *fp, poll_table *wait)
+static __poll_t do_poll(struct file *fp, poll_table *wait)
 {
 	struct apm_user *as;
 
diff --git a/arch/x86/kernel/cpu/mcheck/dev-mcelog.c b/arch/x86/kernel/cpu/mcheck/dev-mcelog.c
index 7f85b76f43bc..213e8c2ca702 100644
--- a/arch/x86/kernel/cpu/mcheck/dev-mcelog.c
+++ b/arch/x86/kernel/cpu/mcheck/dev-mcelog.c
@@ -243,7 +243,7 @@ out:
 	return err ? err : buf - ubuf;
 }
 
-static unsigned int mce_chrdev_poll(struct file *file, poll_table *wait)
+static __poll_t mce_chrdev_poll(struct file *file, poll_table *wait)
 {
 	poll_wait(file, &mce_chrdev_wait, wait);
 	if (READ_ONCE(mcelog.next))
diff --git a/arch/xtensa/include/uapi/asm/poll.h b/arch/xtensa/include/uapi/asm/poll.h
index 4d249040b33d..e3246d41182c 100644
--- a/arch/xtensa/include/uapi/asm/poll.h
+++ b/arch/xtensa/include/uapi/asm/poll.h
@@ -12,9 +12,26 @@
 #ifndef _XTENSA_POLL_H
 #define _XTENSA_POLL_H
 
+#ifndef __KERNEL__
 #define POLLWRNORM	POLLOUT
-#define POLLWRBAND	0x0100
-#define POLLREMOVE	0x0800
+#define POLLWRBAND	(__force __poll_t)0x0100
+#define POLLREMOVE	(__force __poll_t)0x0800
+#else
+#define __ARCH_HAS_MANGLED_POLL
+static inline __u16 mangle_poll(__poll_t val)
+{
+	__u16 v = (__force __u16)val;
+	/* bit 9 -> bit 8, bit 8 -> bit 2 */
+	return (v & ~0x300) | ((v & 0x200) >> 1) | ((v & 0x100) >> 6);
+}
+
+static inline __poll_t demangle_poll(__u16 v)
+{
+        /* bit 8 -> bit 9, bit 2 -> bits 2 and 8 */
+	return (__force __poll_t)((v & ~0x100) | ((v & 0x100) << 1) |
+				((v & 4) << 6));
+}
+#endif
 
 #include <asm-generic/poll.h>