[v2,05/19] arm64: mm: get rid of kimage_vaddr global variable

Commit Message

Ard Biesheuvel Nov. 24, 2022, 12:39 p.m. UTC

We store the address of _text in kimage_vaddr, but since commit
09e3c22a86f6889d ("arm64: Use a variable to store non-global mappings
decision"), we no longer reference this variable from modules so we no
longer need to export it.

In fact, we don't need it at all so let's just get rid of it.

Signed-off-by: Ard Biesheuvel <[e-mail]>
---
 arch/arm64/include/asm/memory.h | 6 ++----
 arch/arm64/kernel/head.S        | 2 +-
 arch/arm64/mm/mmu.c             | 3 ---
 3 files changed, 3 insertions(+), 8 deletions(-)

Patch

diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index 78e5163836a0..a4e1d832a15a 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -182,6 +182,7 @@ 
 #include <linux/types.h>
 #include <asm/boot.h>
 #include <asm/bug.h>
+#include <asm/sections.h>
 
 #if VA_BITS > 48
 extern u64			vabits_actual;
@@ -193,15 +194,12 @@  extern s64			memstart_addr;
 /* PHYS_OFFSET - the physical address of the start of memory. */
 #define PHYS_OFFSET		({ VM_BUG_ON(memstart_addr & 1); memstart_addr; })
 
-/* the virtual base of the kernel image */
-extern u64			kimage_vaddr;
-
 /* the offset between the kernel virtual and physical mappings */
 extern u64			kimage_voffset;
 
 static inline unsigned long kaslr_offset(void)
 {
-	return kimage_vaddr - KIMAGE_VADDR;
+	return (u64)&_text - KIMAGE_VADDR;
 }
 
 static inline bool kaslr_enabled(void)
diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S
index 3ea5bf0a6e17..3b3c5e8e84af 100644
--- a/arch/arm64/kernel/head.S
+++ b/arch/arm64/kernel/head.S
@@ -399,7 +399,7 @@  SYM_FUNC_START_LOCAL(__primary_switched)
 
 	str_l	x21, __fdt_pointer, x5		// Save FDT pointer
 
-	ldr_l	x4, kimage_vaddr		// Save the offset between
+	adrp	x4, _text			// Save the offset between
 	sub	x4, x4, x0			// the kernel virtual and
 	str_l	x4, kimage_voffset, x5		// physical mappings
 
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index 222c1154b550..d083ac6a0764 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -50,9 +50,6 @@  u64 vabits_actual __ro_after_init = VA_BITS_MIN;
 EXPORT_SYMBOL(vabits_actual);
 #endif
 
-u64 kimage_vaddr __ro_after_init = (u64)&_text;
-EXPORT_SYMBOL(kimage_vaddr);
-
 u64 kimage_voffset __ro_after_init;
 EXPORT_SYMBOL(kimage_voffset);