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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>, "H . Peter Anvin" <hpa@zytor.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Borislav Petkov <bp@alien8.de>, Ard Biesheuvel <ardb@kernel.org>,
	Uros Bizjak <ubizjak@gmail.com>, Brian Gerst <brgerst@gmail.com>
Subject: [PATCH v6 14/15] percpu: Remove __per_cpu_load
Date: Thu, 23 Jan 2025 14:07:46 -0500	[thread overview]
Message-ID: <20250123190747.745588-15-brgerst@gmail.com> (raw)
In-Reply-To: <20250123190747.745588-1-brgerst@gmail.com>

__per_cpu_load is now always equal to __per_cpu_start.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
---
 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 b2cbc1628118..c616749ebcf7 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -1083,7 +1083,6 @@ defined(CONFIG_AUTOFDO_CLANG) || defined(CONFIG_PROPELLER_CLANG)
 #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 d8dd31a2e407..8c9f2164cea9 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -3099,7 +3099,7 @@ 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);
 		}
 	}
@@ -3282,7 +3282,7 @@ 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 */
-- 
2.47.1


  parent reply	other threads:[~2025-01-23 19:08 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-01-23 19:07 [PATCH v6 00/15] x86-64: Stack protector and percpu improvements Brian Gerst
2025-01-23 19:07 ` [PATCH v6 01/15] x86: Raise minimum GCC version to 8.1 Brian Gerst
2025-02-18 12:11   ` [tip: x86/asm] x86/build: Raise the " tip-bot2 for Brian Gerst
2025-01-23 19:07 ` [PATCH v6 02/15] x86/stackprotector: Remove stack protector test scripts Brian Gerst
2025-02-18 12:11   ` [tip: x86/asm] " tip-bot2 for Brian Gerst
2025-01-23 19:07 ` [PATCH v6 03/15] x86/boot: Disable stack protector for early boot code Brian Gerst
2025-02-18 12:11   ` [tip: x86/asm] " tip-bot2 for Brian Gerst
2025-01-23 19:07 ` [PATCH v6 04/15] x86/pvh: Use fixed_percpu_data for early boot GSBASE Brian Gerst
2025-01-25 15:06   ` Borislav Petkov
2025-01-25 16:51     ` Brian Gerst
2025-01-26  3:57       ` Borislav Petkov
2025-02-18 12:11   ` [tip: x86/asm] " tip-bot2 for Brian Gerst
2025-03-04 22:26   ` [PATCH v6 04/15] " Mateusz Guzik
2025-03-04 23:44     ` H. Peter Anvin
2025-03-04 23:49       ` Mateusz Guzik
2025-03-05  7:16         ` Uros Bizjak
2025-03-05 12:01           ` Mateusz Guzik
2025-01-23 19:07 ` [PATCH v6 05/15] x86/relocs: Handle R_X86_64_REX_GOTPCRELX relocations Brian Gerst
2025-02-18 12:11   ` [tip: x86/asm] " tip-bot2 for Brian Gerst
2025-01-23 19:07 ` [PATCH v6 06/15] x86/module: Deal with GOT based stack cookie load on Clang < 17 Brian Gerst
2025-02-18  9:07   ` Ingo Molnar
2025-02-18 14:05     ` Brian Gerst
2025-02-18 21:52       ` H. Peter Anvin
2025-02-18 12:11   ` [tip: x86/asm] " tip-bot2 for Ard Biesheuvel
2025-01-23 19:07 ` [PATCH v6 07/15] x86/stackprotector/64: Convert to normal percpu variable Brian Gerst
2025-02-18  9:14   ` Ingo Molnar
2025-02-18 12:11   ` [tip: x86/asm] x86/stackprotector/64: Convert to normal per-CPU variable tip-bot2 for Brian Gerst
2025-02-19 19:59   ` [PATCH v6 07/15] x86/stackprotector/64: Convert to normal percpu variable Nathan Chancellor
2025-02-20  9:23     ` Ard Biesheuvel
2025-03-12 11:59   ` [tip: x86/asm] x86/stackprotector/64: Only export __ref_stack_chk_guard on CONFIG_SMP tip-bot2 for Ingo Molnar
2025-03-19 11:03   ` [tip: x86/core] " tip-bot2 for Ingo Molnar
2025-01-23 19:07 ` [PATCH v6 08/15] x86/percpu/64: Use relative percpu offsets Brian Gerst
2025-02-18 12:11   ` [tip: x86/asm] " tip-bot2 for Brian Gerst
2025-01-23 19:07 ` [PATCH v6 09/15] x86/percpu/64: Remove fixed_percpu_data Brian Gerst
2025-02-18 12:11   ` [tip: x86/asm] " tip-bot2 for Brian Gerst
2025-01-23 19:07 ` [PATCH v6 10/15] x86/boot/64: Remove inverse relocations Brian Gerst
2025-02-18 12:11   ` [tip: x86/asm] " tip-bot2 for Brian Gerst
2025-01-23 19:07 ` [PATCH v6 11/15] x86/percpu/64: Remove INIT_PER_CPU macros Brian Gerst
2025-02-18 12:11   ` [tip: x86/asm] " tip-bot2 for Brian Gerst
2025-01-23 19:07 ` [PATCH v6 12/15] percpu: Remove PER_CPU_FIRST_SECTION Brian Gerst
2025-02-18 12:11   ` [tip: x86/asm] " tip-bot2 for Brian Gerst
2025-01-23 19:07 ` [PATCH v6 13/15] percpu: Remove PERCPU_VADDR() Brian Gerst
2025-02-18 12:11   ` [tip: x86/asm] " tip-bot2 for Brian Gerst
2025-01-23 19:07 ` Brian Gerst [this message]
2025-02-18 12:11   ` [tip: x86/asm] percpu: Remove __per_cpu_load tip-bot2 for Brian Gerst
2025-01-23 19:07 ` [PATCH v6 15/15] kallsyms: Remove KALLSYMS_ABSOLUTE_PERCPU Brian Gerst
2025-02-18 12:11   ` [tip: x86/asm] " tip-bot2 for Brian Gerst
2025-02-18  9:22 ` [PATCH v6 00/15] x86-64: Stack protector and percpu improvements Ingo Molnar
2025-02-18 17:46   ` Uros Bizjak
2025-02-19 11:47     ` Ingo Molnar
2025-02-19 13:18       ` Brian Gerst
2025-02-20  9:51         ` Uros Bizjak
2025-02-20 10:05           ` Ard Biesheuvel
2025-02-20 10:46             ` Uros Bizjak
2025-02-20 10:52               ` Ard Biesheuvel
2025-02-20 10:56                 ` Uros Bizjak
2025-02-20 17:24                 ` Brian Gerst
2025-02-20 17:35                   ` Ard Biesheuvel
2025-02-20 17:47                     ` Brian Gerst
2025-02-20 17:59                       ` Brian Gerst
2025-02-20 20:09                         ` Uros Bizjak
2025-02-20 13:26         ` Ingo Molnar
2025-02-20 17:05           ` Brian Gerst
2025-02-22 12:25             ` Ingo Molnar

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