linux-kernel - [tip:x86/mm] x86/boot/64: Put __startup

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Date:   Tue, 20 Jun 2017 06:29:46 -0700
From:   "tip-bot for Kirill A. Shutemov" <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
        kirill.shutemov@...ux.intel.com, peterz@...radead.org,
        hpa@...or.com, tglx@...utronix.de, mingo@...nel.org,
        fengguang.wu@...el.com
Subject: [tip:x86/mm] x86/boot/64: Put __startup_64() into .head.text

Commit-ID:  26179670a68b7b365fbfe38afb043dcd2e1a4678
Gitweb:     http://git.kernel.org/tip/26179670a68b7b365fbfe38afb043dcd2e1a4678
Author:     Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
AuthorDate: Fri, 16 Jun 2017 14:30:24 +0300
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Tue, 20 Jun 2017 12:56:27 +0200

x86/boot/64: Put __startup_64() into .head.text

Put __startup_64() and fixup_pointer() into .head.text section to make
sure it's always near startup_64() and always callable.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: kernel test robot <fengguang.wu@...el.com>
Cc: wfg@...ux.intel.com
Link: http://lkml.kernel.org/r/20170616113024.ajmif63cmcszry5a@black.fi.intel.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/head64.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c
index 2b2ac38..46c3c73 100644
--- a/arch/x86/kernel/head64.c
+++ b/arch/x86/kernel/head64.c
@@ -38,12 +38,14 @@ extern pmd_t early_dynamic_pgts[EARLY_DYNAMIC_PAGE_TABLES][PTRS_PER_PMD];
 static unsigned int __initdata next_early_pgt;
 pmdval_t early_pmd_flags = __PAGE_KERNEL_LARGE & ~(_PAGE_GLOBAL | _PAGE_NX);
 
-static void __init *fixup_pointer(void *ptr, unsigned long physaddr)
+#define __head	__section(.head.text)
+
+static void __head *fixup_pointer(void *ptr, unsigned long physaddr)
 {
 	return ptr - (void *)_text + (void *)physaddr;
 }
 
-void __init __startup_64(unsigned long physaddr)
+void __head __startup_64(unsigned long physaddr)
 {
 	unsigned long load_delta, *p;
 	pgdval_t *pgd;