linux-kernel - [PATCH 1/3] powerpc/lib/sstep: Use l1_dcache

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Date:   Fri, 21 Jan 2022 08:06:27 +0000
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
CC:     Christophe Leroy <christophe.leroy@...roup.eu>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>
Subject: [PATCH 1/3] powerpc/lib/sstep: Use l1_dcache_bytes() instead of
 opencoding

Don't opencode dcache size retrieval based on whether that's ppc32 or ppc64.

Use l1_dcache_bytes()

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/lib/sstep.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c
index a94b0cd0bdc5..b7316d697d80 100644
--- a/arch/powerpc/lib/sstep.c
+++ b/arch/powerpc/lib/sstep.c
@@ -1065,14 +1065,11 @@ static int __emulate_dcbz(unsigned long ea)
 int emulate_dcbz(unsigned long ea, struct pt_regs *regs)
 {
 	int err;
-	unsigned long size;
+	unsigned long size = l1_dcache_bytes();
 
 #ifdef __powerpc64__
-	size = ppc64_caches.l1d.block_size;
 	if (!(regs->msr & MSR_64BIT))
 		ea &= 0xffffffffUL;
-#else
-	size = L1_CACHE_BYTES;
 #endif
 	ea &= ~(size - 1);
 	if (!address_ok(regs, ea, size))
-- 
2.33.1