From: Borislav Petkov <bp@alien8.de>
To: X86 ML <x86@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH] x86/head_64: Use defines for page size
Date: Thu, 24 Nov 2016 22:05:50 +0100 [thread overview]
Message-ID: <20161124210550.15025-1-bp@alien8.de> (raw)
From: Borislav Petkov <bp@suse.de>
... instead of naked numbers like the rest of the asm does in this file.
No code changed:
# arch/x86/kernel/head_64.o:
text data bss dec hex filename
1124 290864 4096 296084 48494 head_64.o.before
1124 290864 4096 296084 48494 head_64.o.after
md5:
87086e202588939296f66e892414ffe2 head_64.o.before.asm
87086e202588939296f66e892414ffe2 head_64.o.after.asm
Signed-off-by: Borislav Petkov <bp@suse.de>
---
arch/x86/kernel/head_64.S | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index b07cd27e33a5..a15d381e6020 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -112,20 +112,20 @@ startup_64:
movq %rdi, %rax
shrq $PGDIR_SHIFT, %rax
- leaq (4096 + _KERNPG_TABLE)(%rbx), %rdx
+ leaq (PAGE_SIZE + _KERNPG_TABLE)(%rbx), %rdx
movq %rdx, 0(%rbx,%rax,8)
movq %rdx, 8(%rbx,%rax,8)
- addq $4096, %rdx
+ addq $PAGE_SIZE, %rdx
movq %rdi, %rax
shrq $PUD_SHIFT, %rax
andl $(PTRS_PER_PUD-1), %eax
- movq %rdx, 4096(%rbx,%rax,8)
+ movq %rdx, PAGE_SIZE(%rbx,%rax,8)
incl %eax
andl $(PTRS_PER_PUD-1), %eax
- movq %rdx, 4096(%rbx,%rax,8)
+ movq %rdx, PAGE_SIZE(%rbx,%rax,8)
- addq $8192, %rbx
+ addq $PAGE_SIZE * 2, %rbx
movq %rdi, %rax
shrq $PMD_SHIFT, %rdi
addq $(__PAGE_KERNEL_LARGE_EXEC & ~_PAGE_GLOBAL), %rax
--
2.10.0
next reply other threads:[~2016-11-24 21:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-24 21:05 Borislav Petkov [this message]
2016-11-25 6:46 ` [tip:x86/asm] x86/boot/64: Use defines for page size tip-bot for Borislav Petkov
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