Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 asm updates from Ingo Molnar:
 "The main changes in this cycle were the fsgsbase related preparatory
  patches from Chang S. Bae - but there's also an optimized
  memcpy_flushcache() and a cleanup for the __cmpxchg_double() assembly
  glue"

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/fsgsbase/64: Clean up various details
  x86/segments: Introduce the 'CPUNODE' naming to better document the segment limit CPU/node NR trick
  x86/vdso: Initialize the CPU/node NR segment descriptor earlier
  x86/vdso: Introduce helper functions for CPU and node number
  x86/segments/64: Rename the GDT PER_CPU entry to CPU_NUMBER
  x86/fsgsbase/64: Factor out FS/GS segment loading from __switch_to()
  x86/fsgsbase/64: Convert the ELF core dump code to the new FSGSBASE helpers
  x86/fsgsbase/64: Make ptrace use the new FS/GS base helpers
  x86/fsgsbase/64: Introduce FS/GS base helper functions
  x86/fsgsbase/64: Fix ptrace() to read the FS/GS base accurately
  x86/asm: Use CC_SET()/CC_OUT() in __cmpxchg_double()
  x86/asm: Optimize memcpy_flushcache()

2 files changed, 2 insertions, 44 deletions

diff --git a/arch/x86/entry/vdso/vgetcpu.c b/arch/x86/entry/vdso/vgetcpu.c
index 8ec3d1f4ce9a..f86ab0ae1777 100644
--- a/arch/x86/entry/vdso/vgetcpu.c
+++ b/arch/x86/entry/vdso/vgetcpu.c
@@ -13,14 +13,8 @@
 notrace long
 __vdso_getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *unused)
 {
-	unsigned int p;
+	vdso_read_cpunode(cpu, node);
 
-	p = __getcpu();
-
-	if (cpu)
-		*cpu = p & VGETCPU_CPU_MASK;
-	if (node)
-		*node = p >> 12;
 	return 0;
 }
 
diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c
index 5b8b556dbb12..3f9d43f26f63 100644
--- a/arch/x86/entry/vdso/vma.c
+++ b/arch/x86/entry/vdso/vma.c
@@ -332,40 +332,6 @@ static __init int vdso_setup(char *s)
 	return 0;
 }
 __setup("vdso=", vdso_setup);
-#endif
-
-#ifdef CONFIG_X86_64
-static void vgetcpu_cpu_init(void *arg)
-{
-	int cpu = smp_processor_id();
-	struct desc_struct d = { };
-	unsigned long node = 0;
-#ifdef CONFIG_NUMA
-	node = cpu_to_node(cpu);
-#endif
-	if (static_cpu_has(X86_FEATURE_RDTSCP))
-		write_rdtscp_aux((node << 12) | cpu);
-
-	/*
-	 * Store cpu number in limit so that it can be loaded
-	 * quickly in user space in vgetcpu. (12 bits for the CPU
-	 * and 8 bits for the node)
-	 */
-	d.limit0 = cpu | ((node & 0xf) << 12);
-	d.limit1 = node >> 4;
-	d.type = 5;		/* RO data, expand down, accessed */
-	d.dpl = 3;		/* Visible to user code */
-	d.s = 1;		/* Not a system segment */
-	d.p = 1;		/* Present */
-	d.d = 1;		/* 32-bit */
-
-	write_gdt_entry(get_cpu_gdt_rw(cpu), GDT_ENTRY_PER_CPU, &d, DESCTYPE_S);
-}
-
-static int vgetcpu_online(unsigned int cpu)
-{
-	return smp_call_function_single(cpu, vgetcpu_cpu_init, NULL, 1);
-}
 
 static int __init init_vdso(void)
 {
@@ -375,9 +341,7 @@ static int __init init_vdso(void)
 	init_vdso_image(&vdso_image_x32);
 #endif
 
-	/* notifier priority > KVM */
-	return cpuhp_setup_state(CPUHP_AP_X86_VDSO_VMA_ONLINE,
-				 "x86/vdso/vma:online", vgetcpu_online, NULL);
+	return 0;
 }
 subsys_initcall(init_vdso);
 #endif /* CONFIG_X86_64 */