mirror of
https://github.com/torvalds/linux.git
synced 2024-11-21 19:41:42 +00:00
acb13ea0ba
Make it consistent with the atomic/atomic-instrumented.h helpers.
And defconfig size is actually going down!
text data bss dec hex filename
22352096 8213152 1917164 32482412 1efa46c vmlinux.x86-64.defconfig.before
22350551 8213184 1917164 32480899 1ef9e83 vmlinux.x86-64.defconfig.after
Suggested-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Marco Elver <elver@google.com>
Link: https://lore.kernel.org/r/20220113155357.4706-2-bp@alien8.de
104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
|
|
/*
|
|
* This file provides wrappers with sanitizer instrumentation for atomic bit
|
|
* operations.
|
|
*
|
|
* To use this functionality, an arch's bitops.h file needs to define each of
|
|
* the below bit operations with an arch_ prefix (e.g. arch_set_bit(),
|
|
* arch___set_bit(), etc.).
|
|
*/
|
|
#ifndef _ASM_GENERIC_BITOPS_INSTRUMENTED_ATOMIC_H
|
|
#define _ASM_GENERIC_BITOPS_INSTRUMENTED_ATOMIC_H
|
|
|
|
#include <linux/instrumented.h>
|
|
|
|
/**
|
|
* set_bit - Atomically set a bit in memory
|
|
* @nr: the bit to set
|
|
* @addr: the address to start counting from
|
|
*
|
|
* This is a relaxed atomic operation (no implied memory barriers).
|
|
*
|
|
* Note that @nr may be almost arbitrarily large; this function is not
|
|
* restricted to acting on a single-word quantity.
|
|
*/
|
|
static __always_inline void set_bit(long nr, volatile unsigned long *addr)
|
|
{
|
|
instrument_atomic_write(addr + BIT_WORD(nr), sizeof(long));
|
|
arch_set_bit(nr, addr);
|
|
}
|
|
|
|
/**
|
|
* clear_bit - Clears a bit in memory
|
|
* @nr: Bit to clear
|
|
* @addr: Address to start counting from
|
|
*
|
|
* This is a relaxed atomic operation (no implied memory barriers).
|
|
*/
|
|
static __always_inline void clear_bit(long nr, volatile unsigned long *addr)
|
|
{
|
|
instrument_atomic_write(addr + BIT_WORD(nr), sizeof(long));
|
|
arch_clear_bit(nr, addr);
|
|
}
|
|
|
|
/**
|
|
* change_bit - Toggle a bit in memory
|
|
* @nr: Bit to change
|
|
* @addr: Address to start counting from
|
|
*
|
|
* This is a relaxed atomic operation (no implied memory barriers).
|
|
*
|
|
* Note that @nr may be almost arbitrarily large; this function is not
|
|
* restricted to acting on a single-word quantity.
|
|
*/
|
|
static __always_inline void change_bit(long nr, volatile unsigned long *addr)
|
|
{
|
|
instrument_atomic_write(addr + BIT_WORD(nr), sizeof(long));
|
|
arch_change_bit(nr, addr);
|
|
}
|
|
|
|
/**
|
|
* test_and_set_bit - Set a bit and return its old value
|
|
* @nr: Bit to set
|
|
* @addr: Address to count from
|
|
*
|
|
* This is an atomic fully-ordered operation (implied full memory barrier).
|
|
*/
|
|
static __always_inline bool test_and_set_bit(long nr, volatile unsigned long *addr)
|
|
{
|
|
kcsan_mb();
|
|
instrument_atomic_read_write(addr + BIT_WORD(nr), sizeof(long));
|
|
return arch_test_and_set_bit(nr, addr);
|
|
}
|
|
|
|
/**
|
|
* test_and_clear_bit - Clear a bit and return its old value
|
|
* @nr: Bit to clear
|
|
* @addr: Address to count from
|
|
*
|
|
* This is an atomic fully-ordered operation (implied full memory barrier).
|
|
*/
|
|
static __always_inline bool test_and_clear_bit(long nr, volatile unsigned long *addr)
|
|
{
|
|
kcsan_mb();
|
|
instrument_atomic_read_write(addr + BIT_WORD(nr), sizeof(long));
|
|
return arch_test_and_clear_bit(nr, addr);
|
|
}
|
|
|
|
/**
|
|
* test_and_change_bit - Change a bit and return its old value
|
|
* @nr: Bit to change
|
|
* @addr: Address to count from
|
|
*
|
|
* This is an atomic fully-ordered operation (implied full memory barrier).
|
|
*/
|
|
static __always_inline bool test_and_change_bit(long nr, volatile unsigned long *addr)
|
|
{
|
|
kcsan_mb();
|
|
instrument_atomic_read_write(addr + BIT_WORD(nr), sizeof(long));
|
|
return arch_test_and_change_bit(nr, addr);
|
|
}
|
|
|
|
#endif /* _ASM_GENERIC_BITOPS_INSTRUMENTED_NON_ATOMIC_H */
|