From: "Yury Norov (NVIDIA)" <yury.norov@gmail.com>
To: "Ingo Molnar" <mingo@redhat.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Borislav Petkov" <bp@alien8.de>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
"Yury Norov" <yury.norov@gmail.com>,
"Rasmus Villemoes" <linux@rasmusvillemoes.dk>,
"Andrew Morton" <akpm@linux-foundation.org>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
"Tony Luck" <tony.luck@intel.com>,
"Xin Li (Intel)" <xin@zytor.com>,
"Chang S. Bae" <chang.seok.bae@intel.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH 0/2] x86/topology: add bitmap_weight_from() and use it in topo_unit_count()
Date: Sun, 14 Dec 2025 18:54:34 -0500 [thread overview]
Message-ID: <20251214235437.244125-1-yury.norov@gmail.com> (raw)
Currently the function open-codes the missing bitmap_weight_from() with
a for-loop, which is known to be less effective. Add the helper and
switch topo_unit_count() to using it.
Yury Norov (NVIDIA) (2):
bitmap: add bitmap_weight_from()
topology: use bitmap_weight_from()
arch/x86/kernel/cpu/topology.c | 8 ++------
include/linux/bitmap.h | 25 +++++++++++++++++++++++++
lib/bitmap.c | 28 ++++++++++++++++++++++++++++
lib/test_bitmap.c | 29 +++++++++++++++++++++++++++++
4 files changed, 84 insertions(+), 6 deletions(-)
--
2.43.0
next reply other threads:[~2025-12-14 23:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-14 23:54 Yury Norov (NVIDIA) [this message]
2025-12-14 23:54 ` [PATCH 1/2] bitmap: add bitmap_weight_from() Yury Norov (NVIDIA)
2025-12-15 6:59 ` Ingo Molnar
2025-12-14 23:54 ` [PATCH 2/2] x86/topology: use bitmap_weight_from() Yury Norov (NVIDIA)
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