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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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3c7a8e190b
Move __GENMASK and __GENMASK_ULL from include/ to include/uapi/ so that they can be used to define masks in userspace API headers. Compared to what is already in include/linux/bits.h, the definitions need to use the uglified versions of UL(), ULL(), BITS_PER_LONG and BITS_PER_LONG_LONG (which did not even exist), but otherwise expand to the same content. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
16 lines
462 B
C
16 lines
462 B
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/* bits.h: Macros for dealing with bitmasks. */
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#ifndef _UAPI_LINUX_BITS_H
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#define _UAPI_LINUX_BITS_H
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#define __GENMASK(h, l) \
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(((~_UL(0)) - (_UL(1) << (l)) + 1) & \
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(~_UL(0) >> (__BITS_PER_LONG - 1 - (h))))
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#define __GENMASK_ULL(h, l) \
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(((~_ULL(0)) - (_ULL(1) << (l)) + 1) & \
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(~_ULL(0) >> (__BITS_PER_LONG_LONG - 1 - (h))))
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#endif /* _UAPI_LINUX_BITS_H */
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