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Code Issues Releases Wiki Activity

risc-v: replace bitmap_weight with bitmap_empty in riscv_fill_hwcap() 

bitmap_empty() is better than bitmap_weight() because it may return
earlier, and improves on readability.

CC: Albert Ou <aou@eecs.berkeley.edu>
CC: Anup Patel <anup@brainfault.org>
CC: Atish Patra <atishp@atishpatra.org>
CC: Jisheng Zhang <jszhang@kernel.org>
CC: Palmer Dabbelt <palmer@dabbelt.com>
CC: Paul Walmsley <paul.walmsley@sifive.com>
CC: Tsukasa OI <research_trasio@irq.a4lg.com>
CC: linux-riscv@lists.infradead.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Yury Norov 2022-05-08 07:49:50 -07:00
parent 5f8dac3fc7
commit 8f51558e80
1 changed files with 3 additions and 4 deletions
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7
arch/riscv/kernel/cpufeature.c
View File

@ -206,11 +206,10 @@ void __init riscv_fill_hwcap(void)
else
elf_hwcap = this_hwcap;
if (bitmap_weight(riscv_isa, RISCV_ISA_EXT_MAX))
bitmap_and(riscv_isa, riscv_isa, this_isa, RISCV_ISA_EXT_MAX);
else
if (bitmap_empty(riscv_isa, RISCV_ISA_EXT_MAX))
bitmap_copy(riscv_isa, this_isa, RISCV_ISA_EXT_MAX);
else
bitmap_and(riscv_isa, riscv_isa, this_isa, RISCV_ISA_EXT_MAX);
}
/* We don't support systems with F but without D, so mask those out