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

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

CC: Albert Ou <[email protected]>
CC: Anup Patel <[email protected]>
CC: Atish Patra <[email protected]>
CC: Jisheng Zhang <[email protected]>
CC: Palmer Dabbelt <[email protected]>
CC: Paul Walmsley <[email protected]>
CC: Tsukasa OI <[email protected]>
CC: [email protected]
CC: [email protected]
Signed-off-by: Yury Norov <[email protected]>
Reviewed-by: Anup Patel <[email protected]>
This commit is contained in:
Yury Norov committed 2022-06-03 06:52:57 -07:00
1 parent 5f8dac3fc7
commit 8f51558e80
1 file changed
+3 -4
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arch/riscv/kernel/cpufeature.c
+3 -4
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@@ -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