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[73.224.175.84]) by smtp.gmail.com with ESMTPSA id 00721157ae682-7195314cc5bsm11247167b3.33.2025.07.19.18.41.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 19 Jul 2025 18:41:51 -0700 (PDT) From: Yury Norov To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , Rasmus Villemoes , Andrew Morton , "Peter Zijlstra (Intel)" , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , Fernando Fernandez Mancera , "Xin Li (Intel)" , x86@kernel.org, linux-kernel@vger.kernel.org Cc: Yury Norov Subject: [PATCH 2/2] x86: topology: simplify topo_unit_count() Date: Sat, 19 Jul 2025 21:41:45 -0400 Message-ID: <20250720014146.432316-3-yury.norov@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250720014146.432316-1-yury.norov@gmail.com> References: <20250720014146.432316-1-yury.norov@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Yury Norov (NVIDIA) Switch the function to using bitmap_weight_from(), and make it (almost) a one-liner. Signed-off-by: Yury Norov (NVIDIA) --- arch/x86/kernel/cpu/topology.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/arch/x86/kernel/cpu/topology.c b/arch/x86/kernel/cpu/topology.c index e35ccdc84910..db19c5384f92 100644 --- a/arch/x86/kernel/cpu/topology.c +++ b/arch/x86/kernel/cpu/topology.c @@ -208,15 +208,10 @@ static __init bool check_for_real_bsp(u32 apic_id) static unsigned int topo_unit_count(u32 lvlid, enum x86_topology_domains a= t_level, unsigned long *map) { - unsigned int id, end, cnt =3D 0; - /* Calculate the exclusive end */ - end =3D lvlid + (1U << x86_topo_system.dom_shifts[at_level]); + unsigned int end =3D lvlid + (1U << x86_topo_system.dom_shifts[at_level]); =20 - /* Unfortunately there is no bitmap_weight_range() */ - for (id =3D find_next_bit(map, end, lvlid); id < end; id =3D find_next_bi= t(map, end, ++id)) - cnt++; - return cnt; + return bitmap_weight_from(map, lvlid, end); } =20 static __init void topo_register_apic(u32 apic_id, u32 acpi_id, bool prese= nt) --=20 2.43.0