Received-SPF: pass (google.com: domain of linux-kernel+bounces-61080-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:40f1:3f00::1 as permitted sender) client-ip=2604:1380:40f1:3f00::1;
From: Samuel Holland <samuel.holland@sifive.com>
To: Palmer Dabbelt <palmer@dabbelt.com>
Cc: linux-riscv@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Samuel Holland <samuel.holland@sifive.com>
Subject: [PATCH 6/7] riscv: Use offset_in_page() in text patching functions
Date: Sun, 11 Feb 2024 18:55:17 -0800
Message-ID: <20240212025529.1971876-7-samuel.holland@sifive.com>
In-Reply-To: <20240212025529.1971876-1-samuel.holland@sifive.com>
References: <20240212025529.1971876-1-samuel.holland@sifive.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

This is a bit easier to parse than the equivalent bit manipulation.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
---

 arch/riscv/kernel/patch.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/riscv/kernel/patch.c b/arch/riscv/kernel/patch.c
index 9aa0050225c0..b0cf050738aa 100644
--- a/arch/riscv/kernel/patch.c
+++ b/arch/riscv/kernel/patch.c
@@ -54,7 +54,7 @@ static __always_inline void *patch_map(void *addr, const unsigned int fixmap)
 	BUG_ON(!page);
 
 	return (void *)set_fixmap_offset(fixmap, page_to_phys(page) +
-					 (uintaddr & ~PAGE_MASK));
+					 offset_in_page(addr));
 }
 
 static void patch_unmap(int fixmap)
@@ -65,8 +65,8 @@ NOKPROBE_SYMBOL(patch_unmap);
 
 static int __patch_insn_set(void *addr, u8 c, size_t len)
 {
+	bool across_pages = (offset_in_page(addr) + len) > PAGE_SIZE;
 	void *waddr = addr;
-	bool across_pages = (((uintptr_t)addr & ~PAGE_MASK) + len) > PAGE_SIZE;
 
 	/*
 	 * Only two pages can be mapped at a time for writing.
@@ -98,8 +98,8 @@ NOKPROBE_SYMBOL(__patch_insn_set);
 
 static int __patch_insn_write(void *addr, const void *insn, size_t len)
 {
+	bool across_pages = (offset_in_page(addr) + len) > PAGE_SIZE;
 	void *waddr = addr;
-	bool across_pages = (((uintptr_t) addr & ~PAGE_MASK) + len) > PAGE_SIZE;
 	int ret;
 
 	/*
-- 
2.43.0