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

Pull x86 cleanups from Ingo Molnar:
 "Misc cleanups all around the map"

* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/CPU/AMD: Remove amd_get_topology_early()
  x86/tsc: Remove redundant assignment
  x86/crash: Use resource_size()
  x86/cpu: Add a missing prototype for arch_smt_update()
  x86/nospec: Remove unused RSB_FILL_LOOPS
  x86/vdso: Provide missing include file
  x86/Kconfig: Correct spelling and punctuation
  Documentation/x86/boot: Fix typo
  x86/boot: Fix a comment's incorrect file reference
  x86/process: Remove set but not used variables prev and next
  x86/Kconfig: Fix Kconfig indentation

Documentation/x86/boot.rst

@@ -251,7 +251,7 @@ setting fields in the header, you must make sure only to set fields
 supported by the protocol version in use.
 
 
-Details of Harder Fileds
+Details of Header Fields
 ========================
 
 For each field, some are information from the kernel to the bootloader

arch/x86/Kconfig

@@ -479,7 +479,7 @@ config X86_BIGSMP
 	bool "Support for big SMP systems with more than 8 CPUs"
 	depends on SMP
 	---help---
-	  This option is needed for the systems that have more than 8 CPUs
+	  This option is needed for the systems that have more than 8 CPUs.
 
 config X86_EXTENDED_PLATFORM
 	bool "Support for extended (non-PC) x86 platforms"
@@ -1545,12 +1545,12 @@ config AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT
 
 # Common NUMA Features
 config NUMA
-	bool "Numa Memory Allocation and Scheduler Support"
+	bool "NUMA Memory Allocation and Scheduler Support"
 	depends on SMP
 	depends on X86_64 || (X86_32 && HIGHMEM64G && X86_BIGSMP)
 	default y if X86_BIGSMP
 	---help---
-	  Enable NUMA (Non Uniform Memory Access) support.
+	  Enable NUMA (Non-Uniform Memory Access) support.
 
 	  The kernel will try to allocate memory used by a CPU on the
 	  local memory controller of the CPU and add some more

arch/x86/entry/vdso/vdso32-setup.c

@@ -11,6 +11,7 @@
 #include <linux/smp.h>
 #include <linux/kernel.h>
 #include <linux/mm_types.h>
+#include <linux/elf.h>
 
 #include <asm/processor.h>
 #include <asm/vdso.h>

arch/x86/include/asm/nospec-branch.h

@@ -37,7 +37,6 @@
  */
 
 #define RSB_CLEAR_LOOPS		32	/* To forcibly overwrite all entries */
-#define RSB_FILL_LOOPS		16	/* To avoid underflow */
 
 /*
  * Google experimented with loop-unrolling and this turned out to be

arch/x86/include/asm/realmode.h

@@ -14,7 +14,7 @@
 #include <linux/types.h>
 #include <asm/io.h>
 
-/* This must match data at realmode.S */
+/* This must match data at realmode/rm/header.S */
 struct real_mode_header {
 	u32	text_start;
 	u32	ro_end;
@@ -36,7 +36,7 @@ struct real_mode_header {
 #endif
 };
 
-/* This must match data at trampoline_32/64.S */
+/* This must match data at realmode/rm/trampoline_{32,64}.S */
 struct trampoline_header {
 #ifdef CONFIG_X86_32
 	u32 start;

arch/x86/kernel/cpu/amd.c

@@ -319,13 +319,6 @@ static void legacy_fixup_core_id(struct cpuinfo_x86 *c)
 	c->cpu_core_id %= cus_per_node;
 }
 
-
-static void amd_get_topology_early(struct cpuinfo_x86 *c)
-{
-	if (cpu_has(c, X86_FEATURE_TOPOEXT))
-		smp_num_siblings = ((cpuid_ebx(0x8000001e) >> 8) & 0xff) + 1;
-}
-
 /*
  * Fixup core topology information for
  * (1) AMD multi-node processors
@@ -717,7 +710,8 @@ static void early_init_amd(struct cpuinfo_x86 *c)
 		}
 	}
 
-	amd_get_topology_early(c);
+	if (cpu_has(c, X86_FEATURE_TOPOEXT))
+		smp_num_siblings = ((cpuid_ebx(0x8000001e) >> 8) & 0xff) + 1;
 }
 
 static void init_amd_k8(struct cpuinfo_x86 *c)

arch/x86/kernel/cpu/common.c

@@ -14,6 +14,7 @@
 #include <linux/sched/mm.h>
 #include <linux/sched/clock.h>
 #include <linux/sched/task.h>
+#include <linux/sched/smt.h>
 #include <linux/init.h>
 #include <linux/kprobes.h>
 #include <linux/kgdb.h>

arch/x86/kernel/crash.c

@@ -370,7 +370,7 @@ int crash_setup_memmap_entries(struct kimage *image, struct boot_params *params)
 	/* Add crashk_low_res region */
 	if (crashk_low_res.end) {
 		ei.addr = crashk_low_res.start;
-		ei.size = crashk_low_res.end - crashk_low_res.start + 1;
+		ei.size = resource_size(&crashk_low_res);
 		ei.type = E820_TYPE_RAM;
 		add_e820_entry(params, &ei);
 	}

arch/x86/kernel/process.c

@@ -615,12 +615,8 @@ void speculation_ctrl_update_current(void)
 
 void __switch_to_xtra(struct task_struct *prev_p, struct task_struct *next_p)
 {
-	struct thread_struct *prev, *next;
 	unsigned long tifp, tifn;
 
-	prev = &prev_p->thread;
-	next = &next_p->thread;
-
 	tifn = READ_ONCE(task_thread_info(next_p)->flags);
 	tifp = READ_ONCE(task_thread_info(prev_p)->flags);
 

arch/x86/kernel/tsc_sync.c

@@ -233,7 +233,6 @@ static cycles_t check_tsc_warp(unsigned int timeout)
 	 * The measurement runs for 'timeout' msecs:
 	 */
 	end = start + (cycles_t) tsc_khz * timeout;
-	now = start;
 
 	for (i = 0; ; i++) {
 		/*