Merge tag 'x86_cleanups_for_v6.4_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 cleanups from Borislav Petkov:

 - Unify duplicated __pa() and __va() definitions

 - Simplify sysctl tables registration

 - Remove unused symbols

 - Correct function name in comment

* tag 'x86_cleanups_for_v6.4_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/boot: Centralize __pa()/__va() definitions
  x86: Simplify one-level sysctl registration for itmt_kern_table
  x86: Simplify one-level sysctl registration for abi_table2
  x86/platform/intel-mid: Remove unused definitions from intel-mid.h
  x86/uaccess: Remove memcpy_page_flushcache()
  x86/entry: Change stale function name in comment to error_return()

arch/x86/boot/compressed/ident_map_64.c

@@ -8,14 +8,6 @@
  * Copyright (C)      2016  Kees Cook
  */
 
-/*
- * Since we're dealing with identity mappings, physical and virtual
- * addresses are the same, so override these defines which are ultimately
- * used by the headers in misc.h.
- */
-#define __pa(x)  ((unsigned long)(x))
-#define __va(x)  ((void *)((unsigned long)(x)))
-
 /* No PAGE_TABLE_ISOLATION support needed either: */
 #undef CONFIG_PAGE_TABLE_ISOLATION
 

arch/x86/boot/compressed/misc.h

@@ -19,6 +19,15 @@
 /* cpu_feature_enabled() cannot be used this early */
 #define USE_EARLY_PGTABLE_L5
 
+/*
+ * Boot stub deals with identity mappings, physical and virtual addresses are
+ * the same, so override these defines.
+ *
+ * <asm/page.h> will not define them if they are already defined.
+ */
+#define __pa(x)  ((unsigned long)(x))
+#define __va(x)  ((void *)((unsigned long)(x)))
+
 #include <linux/linkage.h>
 #include <linux/screen_info.h>
 #include <linux/elf.h>

arch/x86/boot/compressed/sev.c

@@ -104,9 +104,7 @@ static enum es_result vc_read_mem(struct es_em_ctxt *ctxt,
 }
 
 #undef __init
-#undef __pa
 #define __init
-#define __pa(x)	((unsigned long)(x))
 
 #define __BOOT_COMPRESSED
 

arch/x86/entry/entry_64.S

@@ -1027,7 +1027,7 @@ SYM_CODE_START_LOCAL(paranoid_exit)
 	 *
 	 * NB to anyone to try to optimize this code: this code does
 	 * not execute at all for exceptions from user mode. Those
-	 * exceptions go through error_exit instead.
+	 * exceptions go through error_return instead.
 	 */
 	RESTORE_CR3	scratch_reg=%rax save_reg=%r14
 

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

@@ -70,18 +70,9 @@ static struct ctl_table abi_table2[] = {
 	{}
 };
 
-static struct ctl_table abi_root_table2[] = {
-	{
-		.procname = "abi",
-		.mode = 0555,
-		.child = abi_table2
-	},
-	{}
-};
-
 static __init int ia32_binfmt_init(void)
 {
-	register_sysctl_table(abi_root_table2);
+	register_sysctl("abi", abi_table2);
 	return 0;
 }
 __initcall(ia32_binfmt_init);

arch/x86/include/asm/intel-mid.h

@@ -20,25 +20,4 @@ extern void intel_mid_pwr_power_off(void);
 
 extern int intel_mid_pwr_get_lss_id(struct pci_dev *pdev);
 
-#ifdef CONFIG_X86_INTEL_MID
-
-extern void intel_scu_devices_create(void);
-extern void intel_scu_devices_destroy(void);
-
-#else /* !CONFIG_X86_INTEL_MID */
-
-static inline void intel_scu_devices_create(void) { }
-static inline void intel_scu_devices_destroy(void) { }
-
-#endif /* !CONFIG_X86_INTEL_MID */
-
-/* Bus Select SoC Fuse value */
-#define BSEL_SOC_FUSE_MASK		0x7
-/* FSB 133MHz */
-#define BSEL_SOC_FUSE_001		0x1
-/* FSB 100MHz */
-#define BSEL_SOC_FUSE_101		0x5
-/* FSB 83MHz */
-#define BSEL_SOC_FUSE_111		0x7
-
 #endif /* _ASM_X86_INTEL_MID_H */

arch/x86/include/asm/uaccess_64.h

@@ -54,8 +54,6 @@ raw_copy_to_user(void __user *dst, const void *src, unsigned long size)
 
 extern long __copy_user_nocache(void *dst, const void __user *src, unsigned size);
 extern long __copy_user_flushcache(void *dst, const void __user *src, unsigned size);
-extern void memcpy_page_flushcache(char *to, struct page *page, size_t offset,
-			   size_t len);
 
 static inline int
 __copy_from_user_inatomic_nocache(void *dst, const void __user *src,

arch/x86/kernel/itmt.c

@@ -77,15 +77,6 @@ static struct ctl_table itmt_kern_table[] = {
 	{}
 };
 
-static struct ctl_table itmt_root_table[] = {
-	{
-		.procname	= "kernel",
-		.mode		= 0555,
-		.child		= itmt_kern_table,
-	},
-	{}
-};
-
 static struct ctl_table_header *itmt_sysctl_header;
 
 /**
@@ -114,7 +105,7 @@ int sched_set_itmt_support(void)
 		return 0;
 	}
 
-	itmt_sysctl_header = register_sysctl_table(itmt_root_table);
+	itmt_sysctl_header = register_sysctl("kernel", itmt_kern_table);
 	if (!itmt_sysctl_header) {
 		mutex_unlock(&itmt_update_mutex);
 		return -ENOMEM;

arch/x86/lib/usercopy_64.c

@@ -140,13 +140,4 @@ void __memcpy_flushcache(void *_dst, const void *_src, size_t size)
 	}
 }
 EXPORT_SYMBOL_GPL(__memcpy_flushcache);
-
-void memcpy_page_flushcache(char *to, struct page *page, size_t offset,
-		size_t len)
-{
-	char *from = kmap_atomic(page);
-
-	memcpy_flushcache(to, from + offset, len);
-	kunmap_atomic(from);
-}
 #endif