unify {de,}mangle_poll(), get rid of kernel-side POLL...

except, again, POLLFREE and POLL_BUSY_LOOP.

With this, we finally get to the promised end result:

 - POLL{IN,OUT,...} are plain integers and *not* in __poll_t, so any
   stray instances of ->poll() still using those will be caught by
   sparse.

 - eventpoll.c and select.c warning-free wrt __poll_t

 - no more kernel-side definitions of POLL... - userland ones are
   visible through the entire kernel (and used pretty much only for
   mangle/demangle)

 - same behavior as after the first series (i.e. sparc et.al. epoll(2)
   working correctly).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

6 files changed, 10 insertions, 115 deletions

diff --git a/arch/blackfin/include/uapi/asm/poll.h b/arch/blackfin/include/uapi/asm/poll.h
index 3b162f2d2970..cd2f1a78aba5 100644
--- a/arch/blackfin/include/uapi/asm/poll.h
+++ b/arch/blackfin/include/uapi/asm/poll.h
@@ -9,25 +9,8 @@
 #ifndef _UAPI__BFIN_POLL_H
 #define _UAPI__BFIN_POLL_H
 
-#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
+#define POLLWRBAND	256
 
 #include <asm-generic/poll.h>
 
diff --git a/arch/frv/include/uapi/asm/poll.h b/arch/frv/include/uapi/asm/poll.h
index a44c8f0ebee7..f55b45f475ec 100644
--- a/arch/frv/include/uapi/asm/poll.h
+++ b/arch/frv/include/uapi/asm/poll.h
@@ -2,25 +2,8 @@
 #ifndef _ASM_POLL_H
 #define _ASM_POLL_H
 
-#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
+#define POLLWRBAND	256
 
 #include <asm-generic/poll.h>
 #undef POLLREMOVE
diff --git a/arch/m68k/include/uapi/asm/poll.h b/arch/m68k/include/uapi/asm/poll.h
index d8be239e8141..c3e3fcc15e1d 100644
--- a/arch/m68k/include/uapi/asm/poll.h
+++ b/arch/m68k/include/uapi/asm/poll.h
@@ -2,25 +2,8 @@
 #ifndef __m68k_POLL_H
 #define __m68k_POLL_H
 
-#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
+#define POLLWRBAND	256
 
 #include <asm-generic/poll.h>
 
diff --git a/arch/mips/include/uapi/asm/poll.h b/arch/mips/include/uapi/asm/poll.h
index 3173f8917128..ad289d7b7434 100644
--- a/arch/mips/include/uapi/asm/poll.h
+++ b/arch/mips/include/uapi/asm/poll.h
@@ -2,25 +2,8 @@
 #ifndef __ASM_POLL_H
 #define __ASM_POLL_H
 
-#ifndef __KERNEL__
 #define POLLWRNORM	POLLOUT
-#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
+#define POLLWRBAND	0x0100
 
 #include <asm-generic/poll.h>
 
diff --git a/arch/sparc/include/uapi/asm/poll.h b/arch/sparc/include/uapi/asm/poll.h
index 2a81e79aa3ea..72356c999125 100644
--- a/arch/sparc/include/uapi/asm/poll.h
+++ b/arch/sparc/include/uapi/asm/poll.h
@@ -2,31 +2,11 @@
 #ifndef __SPARC_POLL_H
 #define __SPARC_POLL_H
 
-#ifndef __KERNEL__
 #define POLLWRNORM	POLLOUT
-#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
+#define POLLWRBAND	256
+#define POLLMSG		512
+#define POLLREMOVE	1024
+#define POLLRDHUP       2048
 
 #include <asm-generic/poll.h>
 
diff --git a/arch/xtensa/include/uapi/asm/poll.h b/arch/xtensa/include/uapi/asm/poll.h
index e3246d41182c..4d249040b33d 100644
--- a/arch/xtensa/include/uapi/asm/poll.h
+++ b/arch/xtensa/include/uapi/asm/poll.h
@@ -12,26 +12,9 @@
 #ifndef _XTENSA_POLL_H
 #define _XTENSA_POLL_H
 
-#ifndef __KERNEL__
 #define POLLWRNORM	POLLOUT
-#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
+#define POLLWRBAND	0x0100
+#define POLLREMOVE	0x0800
 
 #include <asm-generic/poll.h>