From: Geert Uytterhoeven <geert@linux-m68k.org>
To: linux-m68k@vger.kernel.org
Cc: Ley Foon Tan <lftan@altera.com>, Arnd Bergmann <arnd@arndb.de>,
linux-kernel@vger.kernel.org,
Geert Uytterhoeven <geert@linux-m68k.org>
Subject: [PATCH] m68k: Switch to asm-generic/futex.h
Date: Tue, 6 Jan 2015 08:53:55 +0100 [thread overview]
Message-ID: <1420530835-8123-1-git-send-email-geert@linux-m68k.org> (raw)
As of commit 00f634bc522dedc8 ("asm-generic: add generic futex for
!CONFIG_SMP") asm-generic follows the m68k futex implementation.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
arch/m68k/include/asm/Kbuild | 1 +
arch/m68k/include/asm/futex.h | 94 -------------------------------------------
2 files changed, 1 insertion(+), 94 deletions(-)
delete mode 100644 arch/m68k/include/asm/futex.h
diff --git a/arch/m68k/include/asm/Kbuild b/arch/m68k/include/asm/Kbuild
index 9b6c691874bd5d4f..1517ed1c64711028 100644
--- a/arch/m68k/include/asm/Kbuild
+++ b/arch/m68k/include/asm/Kbuild
@@ -6,6 +6,7 @@ generic-y += device.h
generic-y += emergency-restart.h
generic-y += errno.h
generic-y += exec.h
+generic-y += futex.h
generic-y += hw_irq.h
generic-y += ioctl.h
generic-y += ipcbuf.h
diff --git a/arch/m68k/include/asm/futex.h b/arch/m68k/include/asm/futex.h
deleted file mode 100644
index bc868af10c965269..0000000000000000
--- a/arch/m68k/include/asm/futex.h
+++ /dev/null
@@ -1,94 +0,0 @@
-#ifndef _ASM_M68K_FUTEX_H
-#define _ASM_M68K_FUTEX_H
-
-#ifdef __KERNEL__
-#if !defined(CONFIG_MMU)
-#include <asm-generic/futex.h>
-#else /* CONFIG_MMU */
-
-#include <linux/futex.h>
-#include <linux/uaccess.h>
-#include <asm/errno.h>
-
-static inline int
-futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
- u32 oldval, u32 newval)
-{
- u32 val;
-
- if (unlikely(get_user(val, uaddr) != 0))
- return -EFAULT;
-
- if (val == oldval && unlikely(put_user(newval, uaddr) != 0))
- return -EFAULT;
-
- *uval = val;
-
- return 0;
-}
-
-static inline int
-futex_atomic_op_inuser(int encoded_op, u32 __user *uaddr)
-{
- int op = (encoded_op >> 28) & 7;
- int cmp = (encoded_op >> 24) & 15;
- int oparg = (encoded_op << 8) >> 20;
- int cmparg = (encoded_op << 20) >> 20;
- int oldval, ret;
- u32 tmp;
-
- if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28))
- oparg = 1 << oparg;
-
- pagefault_disable(); /* implies preempt_disable() */
-
- ret = -EFAULT;
- if (unlikely(get_user(oldval, uaddr) != 0))
- goto out_pagefault_enable;
-
- ret = 0;
- tmp = oldval;
-
- switch (op) {
- case FUTEX_OP_SET:
- tmp = oparg;
- break;
- case FUTEX_OP_ADD:
- tmp += oparg;
- break;
- case FUTEX_OP_OR:
- tmp |= oparg;
- break;
- case FUTEX_OP_ANDN:
- tmp &= ~oparg;
- break;
- case FUTEX_OP_XOR:
- tmp ^= oparg;
- break;
- default:
- ret = -ENOSYS;
- }
-
- if (ret == 0 && unlikely(put_user(tmp, uaddr) != 0))
- ret = -EFAULT;
-
-out_pagefault_enable:
- pagefault_enable(); /* subsumes preempt_enable() */
-
- if (ret == 0) {
- switch (cmp) {
- case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break;
- case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break;
- case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break;
- case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break;
- case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break;
- case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break;
- default: ret = -ENOSYS;
- }
- }
- return ret;
-}
-
-#endif /* CONFIG_MMU */
-#endif /* __KERNEL__ */
-#endif /* _ASM_M68K_FUTEX_H */
--
1.9.1
next reply other threads:[~2015-01-06 7:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-06 7:53 Geert Uytterhoeven [this message]
2015-01-11 10:43 ` [PATCH] m68k: Switch to asm-generic/futex.h Geert Uytterhoeven
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