74c4137b2a
Delete ARM's asm/system.h. It's the last holdout and should be got rid of. This builds for defconfig, lpc32xx_defconfig, exynos_defconfig + XEN, the previous changed to a Gemini system and an omap3 config with TI_DAVINCI_EMAC. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
27 lines
1,011 B
C
27 lines
1,011 B
C
#ifndef __ASM_SYNC_BITOPS_H__
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#define __ASM_SYNC_BITOPS_H__
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#include <asm/bitops.h>
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/* sync_bitops functions are equivalent to the SMP implementation of the
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* original functions, independently from CONFIG_SMP being defined.
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*
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* We need them because _set_bit etc are not SMP safe if !CONFIG_SMP. But
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* under Xen you might be communicating with a completely external entity
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* who might be on another CPU (e.g. two uniprocessor guests communicating
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* via event channels and grant tables). So we need a variant of the bit
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* ops which are SMP safe even on a UP kernel.
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*/
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#define sync_set_bit(nr, p) _set_bit(nr, p)
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#define sync_clear_bit(nr, p) _clear_bit(nr, p)
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#define sync_change_bit(nr, p) _change_bit(nr, p)
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#define sync_test_and_set_bit(nr, p) _test_and_set_bit(nr, p)
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#define sync_test_and_clear_bit(nr, p) _test_and_clear_bit(nr, p)
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#define sync_test_and_change_bit(nr, p) _test_and_change_bit(nr, p)
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#define sync_test_bit(nr, addr) test_bit(nr, addr)
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#define sync_cmpxchg cmpxchg
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#endif
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