mirror of https://gitee.com/openkylin/linux.git
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>
This commit is contained in:
Al Viro
Linus Torvalds
parent
a9a08845e9
commit
7a163b2195
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@ -9,25 +9,8 @@
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#ifndef _UAPI__BFIN_POLL_H
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#define _UAPI__BFIN_POLL_H
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#ifndef __KERNEL__
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#define POLLWRNORM POLLOUT
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#define POLLWRBAND (__force __poll_t)256
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#else
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#define __ARCH_HAS_MANGLED_POLL
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static inline __u16 mangle_poll(__poll_t val)
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{
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__u16 v = (__force __u16)val;
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/* bit 9 -> bit 8, bit 8 -> bit 2 */
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return (v & ~0x300) | ((v & 0x200) >> 1) | ((v & 0x100) >> 6);
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}
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static inline __poll_t demangle_poll(__u16 v)
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{
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/* bit 8 -> bit 9, bit 2 -> bits 2 and 8 */
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return (__force __poll_t)((v & ~0x100) | ((v & 0x100) << 1) |
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((v & 4) << 6));
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}
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#endif
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#define POLLWRBAND 256
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#include <asm-generic/poll.h>
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@ -2,25 +2,8 @@
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#ifndef _ASM_POLL_H
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#define _ASM_POLL_H
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#ifndef __KERNEL__
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#define POLLWRNORM POLLOUT
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#define POLLWRBAND (__force __poll_t)256
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#else
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#define __ARCH_HAS_MANGLED_POLL
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static inline __u16 mangle_poll(__poll_t val)
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{
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__u16 v = (__force __u16)val;
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/* bit 9 -> bit 8, bit 8 -> bit 2 */
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return (v & ~0x300) | ((v & 0x200) >> 1) | ((v & 0x100) >> 6);
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}
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static inline __poll_t demangle_poll(__u16 v)
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{
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/* bit 8 -> bit 9, bit 2 -> bits 2 and 8 */
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return (__force __poll_t)((v & ~0x100) | ((v & 0x100) << 1) |
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((v & 4) << 6));
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}
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#endif
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#define POLLWRBAND 256
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#include <asm-generic/poll.h>
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#undef POLLREMOVE
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@ -2,25 +2,8 @@
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#ifndef __m68k_POLL_H
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#define __m68k_POLL_H
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#ifndef __KERNEL__
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#define POLLWRNORM POLLOUT
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#define POLLWRBAND (__force __poll_t)256
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#else
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#define __ARCH_HAS_MANGLED_POLL
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static inline __u16 mangle_poll(__poll_t val)
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{
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__u16 v = (__force __u16)val;
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/* bit 9 -> bit 8, bit 8 -> bit 2 */
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return (v & ~0x300) | ((v & 0x200) >> 1) | ((v & 0x100) >> 6);
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}
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static inline __poll_t demangle_poll(__u16 v)
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{
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/* bit 8 -> bit 9, bit 2 -> bits 2 and 8 */
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return (__force __poll_t)((v & ~0x100) | ((v & 0x100) << 1) |
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((v & 4) << 6));
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}
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#endif
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#define POLLWRBAND 256
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#include <asm-generic/poll.h>
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@ -2,25 +2,8 @@
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#ifndef __ASM_POLL_H
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#define __ASM_POLL_H
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#ifndef __KERNEL__
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#define POLLWRNORM POLLOUT
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#define POLLWRBAND (__force __poll_t)0x0100
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#else
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#define __ARCH_HAS_MANGLED_POLL
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static inline __u16 mangle_poll(__poll_t val)
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{
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__u16 v = (__force __u16)val;
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/* bit 9 -> bit 8, bit 8 -> bit 2 */
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return (v & ~0x300) | ((v & 0x200) >> 1) | ((v & 0x100) >> 6);
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}
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static inline __poll_t demangle_poll(__u16 v)
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{
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/* bit 8 -> bit 9, bit 2 -> bits 2 and 8 */
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return (__force __poll_t)((v & ~0x100) | ((v & 0x100) << 1) |
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((v & 4) << 6));
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}
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#endif
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#define POLLWRBAND 0x0100
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#include <asm-generic/poll.h>
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@ -2,31 +2,11 @@
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#ifndef __SPARC_POLL_H
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#define __SPARC_POLL_H
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#ifndef __KERNEL__
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#define POLLWRNORM POLLOUT
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#define POLLWRBAND (__force __poll_t)256
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#define POLLMSG (__force __poll_t)512
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#define POLLREMOVE (__force __poll_t)1024
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#define POLLRDHUP (__force __poll_t)2048
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#else
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#define __ARCH_HAS_MANGLED_POLL
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static inline __u16 mangle_poll(__poll_t val)
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{
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__u16 v = (__force __u16)val;
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/* bit 9 -> bit 8, bit 8 -> bit 2, bit 13 -> bit 11 */
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return (v & ~0x300) | ((v & 0x200) >> 1) | ((v & 0x100) >> 6) |
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((v & 0x2000) >> 2);
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}
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static inline __poll_t demangle_poll(__u16 v)
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{
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/* bit 8 -> bit 9, bit 2 -> bits 2 and 8 */
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return (__force __poll_t)((v & ~0x100) | ((v & 0x100) << 1) |
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((v & 4) << 6) | ((v & 0x800) << 2));
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}
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#endif
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#define POLLWRBAND 256
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#define POLLMSG 512
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#define POLLREMOVE 1024
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#define POLLRDHUP 2048
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#include <asm-generic/poll.h>
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@ -12,26 +12,9 @@
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#ifndef _XTENSA_POLL_H
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#define _XTENSA_POLL_H
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#ifndef __KERNEL__
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#define POLLWRNORM POLLOUT
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#define POLLWRBAND (__force __poll_t)0x0100
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#define POLLREMOVE (__force __poll_t)0x0800
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#else
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#define __ARCH_HAS_MANGLED_POLL
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static inline __u16 mangle_poll(__poll_t val)
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{
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__u16 v = (__force __u16)val;
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/* bit 9 -> bit 8, bit 8 -> bit 2 */
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return (v & ~0x300) | ((v & 0x200) >> 1) | ((v & 0x100) >> 6);
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}
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static inline __poll_t demangle_poll(__u16 v)
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{
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/* bit 8 -> bit 9, bit 2 -> bits 2 and 8 */
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return (__force __poll_t)((v & ~0x100) | ((v & 0x100) << 1) |
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((v & 4) << 6));
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}
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#endif
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#define POLLWRBAND 0x0100
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#define POLLREMOVE 0x0800
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#include <asm-generic/poll.h>
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@ -108,4 +108,28 @@ extern int core_sys_select(int n, fd_set __user *inp, fd_set __user *outp,
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extern int poll_select_set_timeout(struct timespec64 *to, time64_t sec,
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long nsec);
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#define __MAP(v, from, to) \
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(from < to ? (v & from) * (to/from) : (v & from) / (from/to))
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static inline __u16 mangle_poll(__poll_t val)
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{
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__u16 v = (__force __u16)val;
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#define M(X) __MAP(v, (__force __u16)EPOLL##X, POLL##X)
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return M(IN) | M(OUT) | M(PRI) | M(ERR) | M(NVAL) |
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M(RDNORM) | M(RDBAND) | M(WRNORM) | M(WRBAND) |
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M(HUP) | M(RDHUP) | M(MSG);
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#undef M
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}
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static inline __poll_t demangle_poll(u16 val)
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{
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#define M(X) (__force __poll_t)__MAP(val, POLL##X, (__force __u16)EPOLL##X)
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return M(IN) | M(OUT) | M(PRI) | M(ERR) | M(NVAL) |
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M(RDNORM) | M(RDBAND) | M(WRNORM) | M(WRBAND) |
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M(HUP) | M(RDHUP) | M(MSG);
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#undef M
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}
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#undef __MAP
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#endif /* _LINUX_POLL_H */
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#define __ASM_GENERIC_POLL_H
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/* These are specified by iBCS2 */
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#define POLLIN (__force __poll_t)0x0001
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#define POLLPRI (__force __poll_t)0x0002
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#define POLLOUT (__force __poll_t)0x0004
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#define POLLERR (__force __poll_t)0x0008
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#define POLLHUP (__force __poll_t)0x0010
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#define POLLNVAL (__force __poll_t)0x0020
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#define POLLIN 0x0001
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#define POLLPRI 0x0002
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#define POLLOUT 0x0004
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#define POLLERR 0x0008
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#define POLLHUP 0x0010
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#define POLLNVAL 0x0020
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/* The rest seem to be more-or-less nonstandard. Check them! */
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#define POLLRDNORM (__force __poll_t)0x0040
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#define POLLRDBAND (__force __poll_t)0x0080
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#define POLLRDNORM 0x0040
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#define POLLRDBAND 0x0080
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#ifndef POLLWRNORM
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#define POLLWRNORM (__force __poll_t)0x0100
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#define POLLWRNORM 0x0100
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#endif
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#ifndef POLLWRBAND
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#define POLLWRBAND (__force __poll_t)0x0200
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#define POLLWRBAND 0x0200
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#endif
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#ifndef POLLMSG
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#define POLLMSG (__force __poll_t)0x0400
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#define POLLMSG 0x0400
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#endif
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#ifndef POLLREMOVE
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#define POLLREMOVE (__force __poll_t)0x1000
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#define POLLREMOVE 0x1000
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#endif
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#ifndef POLLRDHUP
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#define POLLRDHUP (__force __poll_t)0x2000
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#define POLLRDHUP 0x2000
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#endif
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#define POLLFREE (__force __poll_t)0x4000 /* currently only for epoll */
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#define POLL_BUSY_LOOP (__force __poll_t)0x8000
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#ifdef __KERNEL__
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#ifndef __ARCH_HAS_MANGLED_POLL
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static inline __u16 mangle_poll(__poll_t val)
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{
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return (__force __u16)val;
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}
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static inline __poll_t demangle_poll(__u16 v)
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{
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return (__force __poll_t)v;
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}
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#endif
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#endif
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struct pollfd {
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int fd;
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short events;
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