[patch V3 23/44] x86/percpu: Use static initializer for GDT entry

From	Thomas Gleixner <tglx@linutronix.de>
Newsgroups	linux.kernel
Subject	[patch V3 23/44] x86/percpu: Use static initializer for GDT entry
Date	2017-08-28 09:00 +0200
Message-ID	<ujmbG-2dY-63@gated-at.bofh.it> (permalink)
References	<ujmbD-2dY-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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The IDT cleanup is about to remove pack_descriptor(). The GDT setup for the
percpu storage can be achieved with the static initializer as well. Replace
it.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 arch/x86/kernel/setup_percpu.c |    9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -155,13 +155,10 @@ static void __init pcpup_populate_pte(un
 static inline void setup_percpu_segment(int cpu)
 {
 #ifdef CONFIG_X86_32
-	struct desc_struct gdt;
+	struct desc_struct d = GDT_ENTRY_INIT(0x8092, per_cpu_offset(cpu),
+					      0xFFFFF);
 
-	pack_descriptor(&gdt, per_cpu_offset(cpu), 0xFFFFF,
-			0x2 | DESCTYPE_S, 0x8);
-	gdt.s = 1;
-	write_gdt_entry(get_cpu_gdt_rw(cpu),
-			GDT_ENTRY_PERCPU, &gdt, DESCTYPE_S);
+	write_gdt_entry(get_cpu_gdt_rw(cpu), GDT_ENTRY_PERCPU, &d, DESCTYPE_S);
 #endif
 }

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[patch V3 23/44] x86/percpu: Use static initializer for GDT entry Thomas Gleixner <tglx@linutronix.de> - 2017-08-28 09:00 +0200
  [tip:x86/apic] x86/percpu: Use static initializer for GDT entry tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2017-08-29 13:20 +0200

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