linux-kernel - [PATCH v5 03/11] RISC-V: drop a needless check in print_isa

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Date:   Thu, 13 Jul 2023 13:11:01 +0100
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     <palmer@...belt.com>
CC:     <conor@...nel.org>, <conor.dooley@...rochip.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        "Jonathan Corbet" <corbet@....net>,
        Andrew Jones <ajones@...tanamicro.com>,
        "Heiko Stuebner" <heiko.stuebner@...ll.eu>,
        Evan Green <evan@...osinc.com>,
        Sunil V L <sunilvl@...tanamicro.com>,
        <linux-doc@...r.kernel.org>, <linux-riscv@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v5 03/11] RISC-V: drop a needless check in print_isa_ext()

isa_ext_arr cannot be empty, as some of the extensions within it are
always built into the kernel. When this code was first added, back in
commit a9b202606c69 ("RISC-V: Improve /proc/cpuinfo output for ISA
extensions"), the array was empty and needed a dummy item & thus there
could be no extensions present. When the first multi-letter ones did
get added, it was Sscofpmf - which didn't have a Kconfig symbol to
disable it.

Remove this check, as it has been redundant since Sscofpmf was added.

Reviewed-by: Andrew Jones <ajones@...tanamicro.com>
Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
---
Changes in v2:
- Reword commit message to explain why this can be dropped
---
 arch/riscv/kernel/cpu.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c
index f808b67f5a27..e721f15fdf17 100644
--- a/arch/riscv/kernel/cpu.c
+++ b/arch/riscv/kernel/cpu.c
@@ -237,10 +237,6 @@ static void print_isa_ext(struct seq_file *f)
 
 	arr_sz = ARRAY_SIZE(isa_ext_arr) - 1;
 
-	/* No extension support available */
-	if (arr_sz <= 0)
-		return;
-
 	for (i = 0; i <= arr_sz; i++) {
 		edata = &isa_ext_arr[i];
 		if (!__riscv_isa_extension_available(NULL, edata->isa_ext_id))
-- 
2.40.1