From 01573e231f18eb2d99162747186f59511f56b64d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 08 Dec 2023 10:40:48 +0000
Subject: [PATCH] 移去rt
---
kernel/arch/arc/include/asm/cmpxchg.h | 77 ++------------------------------------
1 files changed, 4 insertions(+), 73 deletions(-)
diff --git a/kernel/arch/arc/include/asm/cmpxchg.h b/kernel/arch/arc/include/asm/cmpxchg.h
index 3ea4112..9b87e16 100644
--- a/kernel/arch/arc/include/asm/cmpxchg.h
+++ b/kernel/arch/arc/include/asm/cmpxchg.h
@@ -1,9 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
*/
#ifndef __ASM_ARC_CMPXCHG_H
@@ -23,7 +20,7 @@
/*
* Explicit full memory barrier needed before/after as
- * LLOCK/SCOND thmeselves don't provide any such semantics
+ * LLOCK/SCOND themselves don't provide any such semantics
*/
smp_mb();
@@ -44,7 +41,7 @@
return prev;
}
-#elif !defined(CONFIG_ARC_PLAT_EZNPS)
+#else /* !CONFIG_ARC_HAS_LLSC */
static inline unsigned long
__cmpxchg(volatile void *ptr, unsigned long expected, unsigned long new)
@@ -64,33 +61,7 @@
return prev;
}
-#else /* CONFIG_ARC_PLAT_EZNPS */
-
-static inline unsigned long
-__cmpxchg(volatile void *ptr, unsigned long expected, unsigned long new)
-{
- /*
- * Explicit full memory barrier needed before/after
- */
- smp_mb();
-
- write_aux_reg(CTOP_AUX_GPA1, expected);
-
- __asm__ __volatile__(
- " mov r2, %0\n"
- " mov r3, %1\n"
- " .word %2\n"
- " mov %0, r2"
- : "+r"(new)
- : "r"(ptr), "i"(CTOP_INST_EXC_DI_R2_R2_R3)
- : "r2", "r3", "memory");
-
- smp_mb();
-
- return new;
-}
-
-#endif /* CONFIG_ARC_HAS_LLSC */
+#endif
#define cmpxchg(ptr, o, n) ({ \
(typeof(*(ptr)))__cmpxchg((ptr), \
@@ -106,8 +77,6 @@
*/
#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
-
-#ifndef CONFIG_ARC_PLAT_EZNPS
/*
* xchg (reg with memory) based on "Native atomic" EX insn
@@ -170,44 +139,6 @@
#define xchg(ptr, with) _xchg(ptr, with)
#endif
-
-#else /* CONFIG_ARC_PLAT_EZNPS */
-
-static inline unsigned long __xchg(unsigned long val, volatile void *ptr,
- int size)
-{
- extern unsigned long __xchg_bad_pointer(void);
-
- switch (size) {
- case 4:
- /*
- * Explicit full memory barrier needed before/after
- */
- smp_mb();
-
- __asm__ __volatile__(
- " mov r2, %0\n"
- " mov r3, %1\n"
- " .word %2\n"
- " mov %0, r2\n"
- : "+r"(val)
- : "r"(ptr), "i"(CTOP_INST_XEX_DI_R2_R2_R3)
- : "r2", "r3", "memory");
-
- smp_mb();
-
- return val;
- }
- return __xchg_bad_pointer();
-}
-
-#define xchg(ptr, with) ({ \
- (typeof(*(ptr)))__xchg((unsigned long)(with), \
- (ptr), \
- sizeof(*(ptr))); \
-})
-
-#endif /* CONFIG_ARC_PLAT_EZNPS */
/*
* "atomic" variant of xchg()
--
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