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authorAl Viro <viro@zeniv.linux.org.uk>2017-11-30 03:00:41 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2017-11-30 03:00:41 +0300
commitc71d227fc4133f949dae620ed5e3a250b43f2415 (patch)
treece12b907996c2acd37e9d86f4ba492b09a0ab0f8 /arch/blackfin
parent69112736e2f025ff3ba280cf81c36e25cf7cc59f (diff)
downloadlinux-c71d227fc4133f949dae620ed5e3a250b43f2415.tar.xz
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/blackfin')
-rw-r--r--arch/blackfin/include/uapi/asm/poll.h19
1 files changed, 18 insertions, 1 deletions
diff --git a/arch/blackfin/include/uapi/asm/poll.h b/arch/blackfin/include/uapi/asm/poll.h
index 961e49056b0a..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 (__force __poll_t)4 /* POLLOUT */
+#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>