| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Fri, 11 May 2012 16:00:15 +0800
From: Alex Shi <alex.shi@...el.com>
To: tglx@...utronix.de, mingo@...hat.com, hpa@...or.com, tj@...nel.org,
cl@...ux-foundation.org, tony.luck@...el.com, bp@...64.org,
davem@...emloft.net
Cc: akpm@...ux-foundation.org, ebiederm@...ssion.com,
sfr@...b.auug.org.au, alex.shi@...el.com, luto@....edu,
glommer@...allels.com, fernando@....ntt.co.jp, vapier@...too.org,
eric.dumazet@...il.com, dzickus@...hat.com, dhowells@...hat.com,
cbouatmailru@...il.com, fenghua.yu@...el.com, jkosina@...e.cz,
ext-phil.2.carmody@...ia.com, dan.carpenter@...cle.com,
len.brown@...el.com, fweisbec@...il.com,
paulmck@...ux.vnet.ibm.com, josh@...htriplett.org, anton@...ba.org,
kamezawa.hiroyu@...fujitsu.com, linux-kernel@...r.kernel.org
Subject: [PATCH 3/3] percpu: remove percpu_xxx() functions
Remove percpu_xxx serial functions, all of them were replaced by
this_cpu_xxx or __this_cpu_xxx serial functions
Signed-off-by: Alex Shi <alex.shi@...el.com>
Acked-by: Christoph Lameter <cl@...two.org>
Acked-by: Tejun Heo <tj@...nel.org>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: "H. Peter Anvin" <hpa@...or.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---
arch/x86/include/asm/percpu.h | 16 ++++-------
include/linux/percpu.h | 54 -----------------------------------------
2 files changed, 6 insertions(+), 64 deletions(-)
diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index 967ee3b..d9b8e3f 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -351,7 +351,7 @@ do { \
})
/*
- * percpu_read() makes gcc load the percpu variable every time it is
+ * this_cpu_read() makes gcc load the percpu variable every time it is
* accessed while this_cpu_read_stable() allows the value to be cached.
* this_cpu_read_stable() is more efficient and can be used if its value
* is guaranteed to be valid across cpus. The current users include
@@ -359,15 +359,7 @@ do { \
* per-thread variables implemented as per-cpu variables and thus
* stable for the duration of the respective task.
*/
-#define percpu_read(var) percpu_from_op("mov", var, "m" (var))
#define this_cpu_read_stable(var) percpu_from_op("mov", var, "p" (&(var)))
-#define percpu_write(var, val) percpu_to_op("mov", var, val)
-#define percpu_add(var, val) percpu_add_op(var, val)
-#define percpu_sub(var, val) percpu_add_op(var, -(val))
-#define percpu_and(var, val) percpu_to_op("and", var, val)
-#define percpu_or(var, val) percpu_to_op("or", var, val)
-#define percpu_xor(var, val) percpu_to_op("xor", var, val)
-#define percpu_inc(var) percpu_unary_op("inc", var)
#define __this_cpu_read_1(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
#define __this_cpu_read_2(pcp) percpu_from_op("mov", (pcp), "m"(pcp))
@@ -512,7 +504,11 @@ static __always_inline int x86_this_cpu_constant_test_bit(unsigned int nr,
{
unsigned long __percpu *a = (unsigned long *)addr + nr / BITS_PER_LONG;
- return ((1UL << (nr % BITS_PER_LONG)) & percpu_read(*a)) != 0;
+#ifdef CONFIG_X86_64
+ return ((1UL << (nr % BITS_PER_LONG)) & __this_cpu_read_8(*a)) != 0;
+#else
+ return ((1UL << (nr % BITS_PER_LONG)) & __this_cpu_read_4(*a)) != 0;
+#endif
}
static inline int x86_this_cpu_variable_test_bit(int nr,
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 21638ae..2b9f82c 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -166,60 +166,6 @@ extern phys_addr_t per_cpu_ptr_to_phys(void *addr);
(typeof(type) __percpu *)__alloc_percpu(sizeof(type), __alignof__(type))
/*
- * Optional methods for optimized non-lvalue per-cpu variable access.
- *
- * @var can be a percpu variable or a field of it and its size should
- * equal char, int or long. percpu_read() evaluates to a lvalue and
- * all others to void.
- *
- * These operations are guaranteed to be atomic.
- * The generic versions disable interrupts. Archs are
- * encouraged to implement single-instruction alternatives which don't
- * require protection.
- */
-#ifndef percpu_read
-# define percpu_read(var) \
- ({ \
- typeof(var) *pr_ptr__ = &(var); \
- typeof(var) pr_ret__; \
- pr_ret__ = get_cpu_var(*pr_ptr__); \
- put_cpu_var(*pr_ptr__); \
- pr_ret__; \
- })
-#endif
-
-#define __percpu_generic_to_op(var, val, op) \
-do { \
- typeof(var) *pgto_ptr__ = &(var); \
- get_cpu_var(*pgto_ptr__) op val; \
- put_cpu_var(*pgto_ptr__); \
-} while (0)
-
-#ifndef percpu_write
-# define percpu_write(var, val) __percpu_generic_to_op(var, (val), =)
-#endif
-
-#ifndef percpu_add
-# define percpu_add(var, val) __percpu_generic_to_op(var, (val), +=)
-#endif
-
-#ifndef percpu_sub
-# define percpu_sub(var, val) __percpu_generic_to_op(var, (val), -=)
-#endif
-
-#ifndef percpu_and
-# define percpu_and(var, val) __percpu_generic_to_op(var, (val), &=)
-#endif
-
-#ifndef percpu_or
-# define percpu_or(var, val) __percpu_generic_to_op(var, (val), |=)
-#endif
-
-#ifndef percpu_xor
-# define percpu_xor(var, val) __percpu_generic_to_op(var, (val), ^=)
-#endif
-
-/*
* Branching function to split up a function into a set of functions that
* are called for different scalar sizes of the objects handled.
*/
--
1.7.5.4
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists