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| author | Al Viro <viro@zeniv.linux.org.uk> | 2017-11-30 01:00:41 +0100 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-11-30 01:00:41 +0100 |
| commit | c71d227fc4133f949dae620ed5e3a250b43f2415 (patch) | |
| tree | ce12b907996c2acd37e9d86f4ba492b09a0ab0f8 /arch/xtensa | |
| parent | eventpoll: no need to mask the result of epi_item_poll() again (diff) | |
| download | linux-c71d227fc4133f949dae620ed5e3a250b43f2415.tar.xz linux-c71d227fc4133f949dae620ed5e3a250b43f2415.zip | |
make kernel-side POLL... arch-independent
mangle/demangle on the way to/from userland
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/xtensa')
| -rw-r--r-- | arch/xtensa/include/uapi/asm/poll.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/xtensa/include/uapi/asm/poll.h b/arch/xtensa/include/uapi/asm/poll.h index 22bbc48b9f85..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 (__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> |