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[73.224.175.84]) by smtp.gmail.com with ESMTPSA id 00721157ae682-719532c81d9sm11493017b3.73.2025.07.19.18.58.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 19 Jul 2025 18:58:47 -0700 (PDT) From: Yury Norov To: Sean Christopherson , Paolo Bonzini , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Yury Norov Subject: [PATCH] kvm: x86: simplify kvm_vector_to_index() Date: Sat, 19 Jul 2025 21:58:45 -0400 Message-ID: <20250720015846.433956-1-yury.norov@gmail.com> X-Mailer: git-send-email 2.43.0 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" Use find_nth_bit() and make the function almost a one-liner. Signed-off-by: Yury Norov --- arch/x86/kvm/lapic.c | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 73418dc0ebb2..6c4ec016de6a 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -1106,16 +1106,10 @@ EXPORT_SYMBOL_GPL(kvm_apic_match_dest); int kvm_vector_to_index(u32 vector, u32 dest_vcpus, const unsigned long *bitmap, u32 bitmap_size) { - u32 mod; - int i, idx =3D -1; - - mod =3D vector % dest_vcpus; - - for (i =3D 0; i <=3D mod; i++) { - idx =3D find_next_bit(bitmap, bitmap_size, idx + 1); - BUG_ON(idx =3D=3D bitmap_size); - } + u32 mod =3D vector % dest_vcpus; + int idx =3D find_nth_bit(bitmap, bitmap_size, mod); =20 + BUG_ON(idx >=3D bitmap_size); return idx; } =20 --=20 2.43.0