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From: Brian Gerst <brgerst@gmail.com>
To: linux-kernel@vger.kernel.org, x86@kernel.org
Cc: Ingo Molnar <mingo@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Borislav Petkov <bp@alien8.de>, "H . Peter Anvin" <hpa@zytor.com>,
	Uros Bizjak <ubizjak@gmail.com>,
	David.Laight@aculab.com, Brian Gerst <brgerst@gmail.com>
Subject: [PATCH v4 15/16] percpu: Remove __per_cpu_load
Date: Fri, 22 Mar 2024 12:52:32 -0400	[thread overview]
Message-ID: <20240322165233.71698-16-brgerst@gmail.com> (raw)
In-Reply-To: <20240322165233.71698-1-brgerst@gmail.com>

__per_cpu_load is now always equal to __per_cpu_start.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
---
 include/asm-generic/sections.h    | 2 +-
 include/asm-generic/vmlinux.lds.h | 1 -
 mm/percpu.c                       | 4 ++--
 3 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h
index c768de6f19a9..0755bc39b0d8 100644
--- a/include/asm-generic/sections.h
+++ b/include/asm-generic/sections.h
@@ -39,7 +39,7 @@ extern char __init_begin[], __init_end[];
 extern char _sinittext[], _einittext[];
 extern char __start_ro_after_init[], __end_ro_after_init[];
 extern char _end[];
-extern char __per_cpu_load[], __per_cpu_start[], __per_cpu_end[];
+extern char __per_cpu_start[], __per_cpu_end[];
 extern char __kprobes_text_start[], __kprobes_text_end[];
 extern char __entry_text_start[], __entry_text_end[];
 extern char __start_rodata[], __end_rodata[];
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 430b2ed2aa58..a67452ea94d3 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -1052,7 +1052,6 @@
 #define PERCPU_SECTION(cacheline)					\
 	. = ALIGN(PAGE_SIZE);						\
 	.data..percpu	: AT(ADDR(.data..percpu) - LOAD_OFFSET) {	\
-		__per_cpu_load = .;					\
 		PERCPU_INPUT(cacheline)					\
 	}
 
diff --git a/mm/percpu.c b/mm/percpu.c
index 4e11fc1e6def..a584b5a78f72 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -3153,7 +3153,7 @@ int __init pcpu_embed_first_chunk(size_t reserved_size, size_t dyn_size,
 				continue;
 			}
 			/* copy and return the unused part */
-			memcpy(ptr, __per_cpu_load, ai->static_size);
+			memcpy(ptr, __per_cpu_start, ai->static_size);
 			pcpu_fc_free(ptr + size_sum, ai->unit_size - size_sum);
 		}
 	}
@@ -3336,7 +3336,7 @@ int __init pcpu_page_first_chunk(size_t reserved_size, pcpu_fc_cpu_to_node_fn_t
 		flush_cache_vmap_early(unit_addr, unit_addr + ai->unit_size);
 
 		/* copy static data */
-		memcpy((void *)unit_addr, __per_cpu_load, ai->static_size);
+		memcpy((void *)unit_addr, __per_cpu_start, ai->static_size);
 	}
 
 	/* we're ready, commit */
-- 
2.44.0


  parent reply	other threads:[~2024-03-22 16:53 UTC|newest]

Thread overview: 42+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-03-22 16:52 [PATCH v4 00/16] x86-64: Stack protector and percpu improvements Brian Gerst
2024-03-22 16:52 ` [PATCH v4 01/16] x86/stackprotector/32: Remove stack protector test script Brian Gerst
2024-03-23 17:00   ` Uros Bizjak
2024-03-22 16:52 ` [PATCH v4 02/16] x86/stackprotector/64: " Brian Gerst
2024-03-23 17:01   ` Uros Bizjak
2024-03-22 16:52 ` [PATCH v4 03/16] x86/boot: Disable stack protector for early boot code Brian Gerst
2024-03-22 16:52 ` [PATCH v4 04/16] x86/pvh: Use fixed_percpu_data for early boot GSBASE Brian Gerst
2024-03-22 16:52 ` [PATCH v4 05/16] x86/relocs: Handle R_X86_64_REX_GOTPCRELX relocations Brian Gerst
2024-03-22 16:52 ` [PATCH v4 06/16] objtool: Allow adding relocations to an existing section Brian Gerst
2024-03-22 16:52 ` [PATCH v4 07/16] objtool: Convert fixed location stack protector accesses Brian Gerst
2024-03-22 16:52 ` [PATCH v4 08/16] x86/stackprotector/64: Convert to normal percpu variable Brian Gerst
2024-03-23 17:11   ` Uros Bizjak
2024-03-22 16:52 ` [PATCH v4 09/16] x86/percpu/64: Use relative percpu offsets Brian Gerst
2024-03-23 17:14   ` Uros Bizjak
2024-03-22 16:52 ` [PATCH v4 10/16] x86/percpu/64: Remove fixed_percpu_data Brian Gerst
2024-03-23 17:14   ` Uros Bizjak
2024-03-22 16:52 ` [PATCH v4 11/16] x86/boot/64: Remove inverse relocations Brian Gerst
2024-03-22 16:52 ` [PATCH v4 12/16] x86/percpu/64: Remove INIT_PER_CPU macros Brian Gerst
2024-03-23 17:15   ` Uros Bizjak
2024-03-22 16:52 ` [PATCH v4 13/16] percpu: Remove PER_CPU_FIRST_SECTION Brian Gerst
2024-03-23 17:17   ` Uros Bizjak
2024-03-22 16:52 ` [PATCH v4 14/16] percpu: Remove PERCPU_VADDR() Brian Gerst
2024-03-22 16:52 ` Brian Gerst [this message]
2024-03-22 16:52 ` [PATCH v4 16/16] kallsyms: Remove KALLSYMS_ABSOLUTE_PERCPU Brian Gerst
2024-03-23 11:39 ` [PATCH v4 00/16] x86-64: Stack protector and percpu improvements Uros Bizjak
2024-03-23 13:22   ` Brian Gerst
2024-03-23 16:16     ` Linus Torvalds
2024-03-23 17:06       ` Linus Torvalds
2024-03-24 19:09         ` David Laight
2024-03-25 14:51         ` Arnd Bergmann
2024-03-25 15:26           ` Takashi Iwai
2024-03-25 18:08             ` Arnd Bergmann
2024-03-26  7:02               ` Uros Bizjak
2024-03-23 22:55       ` Arnd Bergmann
2024-03-25 15:14         ` Ard Biesheuvel
2024-03-24  2:25   ` Ingo Molnar
2024-03-24  3:51     ` Brian Gerst
2024-03-24  4:05       ` Ingo Molnar
2024-03-24  5:43         ` Brian Gerst
2024-03-24 10:53           ` Ingo Molnar
2024-03-24 12:34             ` Brian Gerst
2024-03-24 18:14               ` Ingo Molnar

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