[PATCH 8/8] arch: use rest_of_page() macro where appropriate

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From: Yury Norov <ynorov@nvidia•com>
To: Andrew Morton <akpm@linux-foundation•org>,
	"David S. Miller" <davem@davemloft•net>,
	"Michael S. Tsirkin" <mst@redhat•com>,
	"Theodore Ts'o" <tytso@mit•edu>,
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	Yury Norov <yury.norov@gmail•com>, Zheng Gu <cengku@gmail•com>
Cc: Yury Norov <ynorov@nvidia•com>,
	linux-kernel@vger•kernel.org, x86@kernel•org,
	linux-arm-kernel@lists•infradead.org,
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Subject: [PATCH 8/8] arch: use rest_of_page() macro where appropriate
Date: Tue,  3 Mar 2026 20:27:16 -0500	[thread overview]
Message-ID: <20260304012717.201797-9-ynorov@nvidia.com> (raw)
In-Reply-To: <20260304012717.201797-1-ynorov@nvidia.com>

Switch arch code to using the macro. No functional changes intended.

Signed-off-by: Yury Norov <ynorov@nvidia•com>
---
 arch/arm64/kernel/patching.c     | 4 +---
 arch/powerpc/lib/code-patching.c | 6 +++---
 arch/riscv/kernel/sbi.c          | 4 ++--
 3 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/kernel/patching.c b/arch/arm64/kernel/patching.c
index 1041bc67a3ee..4c3a4401719b 100644
--- a/arch/arm64/kernel/patching.c
+++ b/arch/arm64/kernel/patching.c
@@ -116,9 +116,7 @@ static void *__text_poke(text_poke_f func, void *addr, void *src, size_t len)
 
 	while (patched < len) {
 		ptr = addr + patched;
-		size = min_t(size_t, PAGE_SIZE - offset_in_page(ptr),
-			     len - patched);
-
+		size = min_t(size_t, rest_of_page(ptr), len - patched);
 		waddr = patch_map(ptr, FIX_TEXT_POKE0);
 		func(waddr, src, patched, size);
 		patch_unmap(FIX_TEXT_POKE0);
diff --git a/arch/powerpc/lib/code-patching.c b/arch/powerpc/lib/code-patching.c
index f84e0337cc02..186a9cb79ee3 100644
--- a/arch/powerpc/lib/code-patching.c
+++ b/arch/powerpc/lib/code-patching.c
@@ -463,7 +463,7 @@ static int __patch_instructions(u32 *patch_addr, u32 *code, size_t len, bool rep
 
 /*
  * A page is mapped and instructions that fit the page are patched.
- * Assumes 'len' to be (PAGE_SIZE - offset_in_page(addr)) or below.
+ * Assumes 'len' to be rest_of_page(addr) or below.
  */
 static int __do_patch_instructions_mm(u32 *addr, u32 *code, size_t len, bool repeat_instr)
 {
@@ -514,7 +514,7 @@ static int __do_patch_instructions_mm(u32 *addr, u32 *code, size_t len, bool rep
 
 /*
  * A page is mapped and instructions that fit the page are patched.
- * Assumes 'len' to be (PAGE_SIZE - offset_in_page(addr)) or below.
+ * Assumes 'len' to be rest_of_page(addr) or below.
  */
 static int __do_patch_instructions(u32 *addr, u32 *code, size_t len, bool repeat_instr)
 {
@@ -554,7 +554,7 @@ int patch_instructions(u32 *addr, u32 *code, size_t len, bool repeat_instr)
 		size_t plen;
 		int err;
 
-		plen = min_t(size_t, PAGE_SIZE - offset_in_page(addr), len);
+		plen = min_t(size_t, rest_of_page(addr), len);
 
 		local_irq_save(flags);
 		if (mm_patch_enabled())
diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c
index c443337056ab..9a2f656f776f 100644
--- a/arch/riscv/kernel/sbi.c
+++ b/arch/riscv/kernel/sbi.c
@@ -602,7 +602,7 @@ int sbi_debug_console_write(const char *bytes, unsigned int num_bytes)
 	else
 		base_addr = __pa(bytes);
 	if (PAGE_SIZE < (offset_in_page(bytes) + num_bytes))
-		num_bytes = PAGE_SIZE - offset_in_page(bytes);
+		num_bytes = rest_of_page(bytes);
 
 	if (IS_ENABLED(CONFIG_32BIT))
 		ret = sbi_ecall(SBI_EXT_DBCN, SBI_EXT_DBCN_CONSOLE_WRITE,
@@ -631,7 +631,7 @@ int sbi_debug_console_read(char *bytes, unsigned int num_bytes)
 	else
 		base_addr = __pa(bytes);
 	if (PAGE_SIZE < (offset_in_page(bytes) + num_bytes))
-		num_bytes = PAGE_SIZE - offset_in_page(bytes);
+		num_bytes = rest_of_page(bytes);
 
 	if (IS_ENABLED(CONFIG_32BIT))
 		ret = sbi_ecall(SBI_EXT_DBCN, SBI_EXT_DBCN_CONSOLE_READ,
-- 
2.43.0

next prev parent reply	other threads:[~2026-03-04  1:27 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-04  1:27 [PATCH 0/8] mm: globalize rest_of_page() macro Yury Norov
2026-03-04  1:27 ` [PATCH 1/8] mm: add " Yury Norov
2026-03-04  1:27 ` [PATCH 2/8] fs: use rest_of_page() macro where appropriate Yury Norov
2026-03-04  1:27 ` [PATCH 3/8] net: " Yury Norov
2026-03-04  1:27 ` [PATCH 4/8] core: " Yury Norov
2026-03-04  1:27 ` [PATCH 5/8] spi: " Yury Norov
2026-03-04 11:10   ` Mark Brown
2026-03-04  1:27 ` [PATCH 6/8] KVM: " Yury Norov
2026-03-04  1:27 ` [PATCH 7/8] drivers: ALSA: " Yury Norov
2026-03-04  1:27 ` Yury Norov [this message]
2026-04-02 21:58   ` [PATCH 8/8] arch: " Paul Walmsley
2026-03-04  2:28 ` [PATCH 0/8] mm: globalize rest_of_page() macro Jakub Kicinski
2026-03-04  2:42   ` Jens Axboe
2026-03-04  2:49     ` Sean Christopherson
2026-03-04  3:32       ` Yury Norov
2026-03-04  3:35         ` Jens Axboe
2026-03-04 12:48       ` Peter Zijlstra

find likely ancestor, descendant, or conflicting patches for this message:
( dfblob:1041bc67a3e dfblob:4c3a4401719 dfblob:f84e0337cc0
dfblob:186a9cb79ee dfblob:c443337056a dfblob:9a2f656f776 )
 OR (
bs:"[PATCH 8/8] arch: use rest_of_page() macro where appropriate" )
	(help)

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