[PATCH v2 09/11] x86/percpu/64: Remove INIT_PER_CPU macros

Brian Gerst
2023-10-26T16:02:09Z

The load and link addresses of percpu variables are now the same, so
these macros are no longer necessary.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
---
arch/x86/include/asm/percpu.h | 22 ----------------------
arch/x86/kernel/irq_64.c | 1 -
arch/x86/kernel/vmlinux.lds.S | 7 -------
arch/x86/tools/relocs.c | 1 -
4 files changed, 31 deletions(-)

diff --git a/arch/x86/include/asm/percpu.h b/arch/x86/include/asm/percpu.h
index b86b27d15e52..7a176381ee01 100644
--- a/arch/x86/include/asm/percpu.h
+++ b/arch/x86/include/asm/percpu.h
@@ -20,12 +20,6 @@

#define PER_CPU_VAR(var) __percpu(var)__percpu_rel

-#ifdef CONFIG_X86_64_SMP
-#define INIT_PER_CPU_VAR(var) init_per_cpu__##var
-#else
-#define INIT_PER_CPU_VAR(var) var
-#endif
-
#else /* ...!ASSEMBLY */

#include <linux/kernel.h>
@@ -96,22 +90,6 @@
#define __percpu_arg(x) __percpu_prefix "%" #x
#define __force_percpu_arg(x) __force_percpu_prefix "%" #x

-/*
- * Initialized pointers to per-cpu variables needed for the boot
- * processor need to use these macros to get the proper address
- * offset from __per_cpu_load on SMP.
- *
- * There also must be an entry in vmlinux_64.lds.S
- */
-#define DECLARE_INIT_PER_CPU(var) \
- extern typeof(var) init_per_cpu_var(var)
-
-#ifdef CONFIG_X86_64_SMP
-#define init_per_cpu_var(var) init_per_cpu__##var
-#else
-#define init_per_cpu_var(var) var
-#endif
-
/* For arch-specific code, we can use direct single-insn ops (they
* don't give an lvalue though). */

diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c
index fe0c859873d1..30424f9876bc 100644
--- a/arch/x86/kernel/irq_64.c
+++ b/arch/x86/kernel/irq_64.c
@@ -26,7 +26,6 @@
#include <asm/apic.h>

DEFINE_PER_CPU_PAGE_ALIGNED(struct irq_stack, irq_stack_backing_store) __visible;
-DECLARE_INIT_PER_CPU(irq_stack_backing_store);

#ifdef CONFIG_VMAP_STACK
/*
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index efa4885060b5..9aea7b6b02c7 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -482,13 +482,6 @@ SECTIONS
"kernel image bigger than KERNEL_IMAGE_SIZE");

#ifdef CONFIG_X86_64
-/*
- * Per-cpu symbols which need to be offset from __per_cpu_load
- * for the boot processor.
- */
-#define INIT_PER_CPU(x) init_per_cpu__##x = ABSOLUTE(x)
-INIT_PER_CPU(gdt_page);
-INIT_PER_CPU(irq_stack_backing_store);

#ifdef CONFIG_CPU_UNRET_ENTRY
. = ASSERT((retbleed_return_thunk & 0x3f) == 0, "retbleed_return_thunk not cacheline-aligned");
diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
index 7feb63179b62..931d90aa814c 100644
--- a/arch/x86/tools/relocs.c
+++ b/arch/x86/tools/relocs.c
@@ -83,7 +83,6 @@ static const char * const sym_regex_kernel[S_NSYMTYPES] = {
"__initramfs_start|"
"(jiffies|jiffies_64)|"
#if ELF_BITS == 64
- "init_per_cpu__.*|"
"__end_rodata_hpage_align|"
#endif
"__vvar_page|"
--
2.41.0