Date: Fri, 27 Feb 2026 02:29:28 +0000 From: Bjoern A. Zeeb <bz@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 5585c7c36518 - stable/15 - LinuxKPI: improve hweight<n> if complie time constant Message-ID: <69a10188.21a1b.22132e06@gitrepo.freebsd.org>
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The branch stable/15 has been updated by bz: URL: https://cgit.FreeBSD.org/src/commit/?id=5585c7c365180aecb9ffd82723604ee4cde6ffc9 commit 5585c7c365180aecb9ffd82723604ee4cde6ffc9 Author: Bjoern A. Zeeb <bz@FreeBSD.org> AuthorDate: 2026-01-20 22:41:12 +0000 Commit: Bjoern A. Zeeb <bz@FreeBSD.org> CommitDate: 2026-02-26 22:59:59 +0000 LinuxKPI: improve hweight<n> if complie time constant rtw89(4) uses a static_assert() with hweight<n> calls. In order to avoid compile time errors, deal with the case when the arguments to hweight<n> are complie time constant. Sponsored by: The FreeBSD Foundation Reviewed by: emaste Differential Revision: https://reviews.freebsd.org/D54806 (cherry picked from commit 7e4a2b381dcb5b2bcaf528e010096fd2d14868b1) --- sys/compat/linuxkpi/common/include/linux/bitops.h | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/sys/compat/linuxkpi/common/include/linux/bitops.h b/sys/compat/linuxkpi/common/include/linux/bitops.h index 8fac80820f30..e34ba391421a 100644 --- a/sys/compat/linuxkpi/common/include/linux/bitops.h +++ b/sys/compat/linuxkpi/common/include/linux/bitops.h @@ -51,12 +51,6 @@ #define BITS_PER_TYPE(t) (sizeof(t) * BITS_PER_BYTE) #define BITS_TO_BYTES(n) howmany((n), BITS_PER_BYTE) -#define hweight8(x) bitcount((uint8_t)(x)) -#define hweight16(x) bitcount16(x) -#define hweight32(x) bitcount32(x) -#define hweight64(x) bitcount64(x) -#define hweight_long(x) bitcountl(x) - #if __has_builtin(__builtin_popcountg) #define HWEIGHT8(x) (__builtin_popcountg((uint8_t)(x))) #define HWEIGHT16(x) (__builtin_popcountg((uint16_t)(x))) @@ -70,6 +64,12 @@ #define HWEIGHT64(x) (__const_bitcount64((uint64_t)(x))) #endif +#define hweight8(x) (__builtin_constant_p(x) ? HWEIGHT8(x) : bitcount((uint8_t)(x))) +#define hweight16(x) (__builtin_constant_p(x) ? HWEIGHT16(x) : bitcount16(x)) +#define hweight32(x) (__builtin_constant_p(x) ? HWEIGHT32(x) : bitcount32(x)) +#define hweight64(x) (__builtin_constant_p(x) ? HWEIGHT64(x) : bitcount64(x)) +#define hweight_long(x) bitcountl(x) + static inline int __ffs(int mask) {home | help
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