asm-generic/tlb: rename HAVE_RCU_TABLE_FREE

Towards a more consistent naming scheme.

[akpm@linux-foundation.org: fix sparc64 Kconfig]
Link: http://lkml.kernel.org/r/20200116064531.483522-7-aneesh.kumar@linux.ibm.comSigned-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/Kconfig

@@ -393,7 +393,7 @@ config HAVE_ARCH_JUMP_LABEL
 config HAVE_ARCH_JUMP_LABEL_RELATIVE
 	bool
 
-config HAVE_RCU_TABLE_FREE
+config MMU_GATHER_RCU_TABLE_FREE
 	bool
 
 config HAVE_MMU_GATHER_PAGE_SIZE

arch/arm/Kconfig

@@ -102,7 +102,7 @@ config ARM
 	select HAVE_PERF_EVENTS
 	select HAVE_PERF_REGS
 	select HAVE_PERF_USER_STACK_DUMP
-	select HAVE_RCU_TABLE_FREE if SMP && ARM_LPAE
+	select MMU_GATHER_RCU_TABLE_FREE if SMP && ARM_LPAE
 	select HAVE_REGS_AND_STACK_ACCESS_API
 	select HAVE_RSEQ
 	select HAVE_STACKPROTECTOR

arch/arm/include/asm/tlb.h

@@ -37,7 +37,7 @@ static inline void __tlb_remove_table(void *_table)
 
 #include <asm-generic/tlb.h>
 
-#ifndef CONFIG_HAVE_RCU_TABLE_FREE
+#ifndef CONFIG_MMU_GATHER_RCU_TABLE_FREE
 #define tlb_remove_table(tlb, entry) tlb_remove_page(tlb, entry)
 #endif
 

arch/arm64/Kconfig

@@ -165,7 +165,7 @@ config ARM64
 	select HAVE_REGS_AND_STACK_ACCESS_API
 	select HAVE_FUNCTION_ARG_ACCESS_API
 	select HAVE_FUTEX_CMPXCHG if FUTEX
-	select HAVE_RCU_TABLE_FREE
+	select MMU_GATHER_RCU_TABLE_FREE
 	select HAVE_RSEQ
 	select HAVE_STACKPROTECTOR
 	select HAVE_SYSCALL_TRACEPOINTS

arch/powerpc/Kconfig

@@ -222,7 +222,7 @@ config PPC
 	select HAVE_HARDLOCKUP_DETECTOR_PERF	if PERF_EVENTS && HAVE_PERF_EVENTS_NMI && !HAVE_HARDLOCKUP_DETECTOR_ARCH
 	select HAVE_PERF_REGS
 	select HAVE_PERF_USER_STACK_DUMP
-	select HAVE_RCU_TABLE_FREE
+	select MMU_GATHER_RCU_TABLE_FREE
 	select HAVE_MMU_GATHER_PAGE_SIZE
 	select HAVE_REGS_AND_STACK_ACCESS_API
 	select HAVE_RELIABLE_STACKTRACE		if PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN

arch/s390/Kconfig

@@ -169,7 +169,7 @@ config S390
 	select HAVE_OPROFILE
 	select HAVE_PCI
 	select HAVE_PERF_EVENTS
-	select HAVE_RCU_TABLE_FREE
+	select MMU_GATHER_RCU_TABLE_FREE
 	select HAVE_REGS_AND_STACK_ACCESS_API
 	select HAVE_RELIABLE_STACKTRACE
 	select HAVE_RSEQ

arch/sparc/Kconfig

@@ -64,7 +64,7 @@ config SPARC64
 	select HAVE_FUNCTION_GRAPH_TRACER
 	select HAVE_KRETPROBES
 	select HAVE_KPROBES
-	select HAVE_RCU_TABLE_FREE if SMP
+	select MMU_GATHER_RCU_TABLE_FREE if SMP
 	select HAVE_MEMBLOCK_NODE_MAP
 	select HAVE_ARCH_TRANSPARENT_HUGEPAGE
 	select HAVE_DYNAMIC_FTRACE

arch/sparc/include/asm/tlb_64.h

@@ -33,7 +33,7 @@ void flush_tlb_pending(void);
  * and therefore we don't need a TLBI when freeing page-table pages.
  */
 
-#ifdef CONFIG_HAVE_RCU_TABLE_FREE
+#ifdef CONFIG_MMU_GATHER_RCU_TABLE_FREE
 #define tlb_needs_table_invalidate()	(false)
 #endif
 

arch/x86/Kconfig

@@ -203,7 +203,7 @@ config X86
 	select HAVE_PCI
 	select HAVE_PERF_REGS
 	select HAVE_PERF_USER_STACK_DUMP
-	select HAVE_RCU_TABLE_FREE		if PARAVIRT
+	select MMU_GATHER_RCU_TABLE_FREE		if PARAVIRT
 	select HAVE_REGS_AND_STACK_ACCESS_API
 	select HAVE_RELIABLE_STACKTRACE		if X86_64 && (UNWINDER_FRAME_POINTER || UNWINDER_ORC) && STACK_VALIDATION
 	select HAVE_FUNCTION_ARG_ACCESS_API

arch/x86/include/asm/tlb.h

@@ -29,8 +29,8 @@ static inline void tlb_flush(struct mmu_gather *tlb)
  * shootdown, enablement code for several hypervisors overrides
  * .flush_tlb_others hook in pv_mmu_ops and implements it by issuing
  * a hypercall. To keep software pagetable walkers safe in this case we
- * switch to RCU based table free (HAVE_RCU_TABLE_FREE). See the comment
- * below 'ifdef CONFIG_HAVE_RCU_TABLE_FREE' in include/asm-generic/tlb.h
+ * switch to RCU based table free (MMU_GATHER_RCU_TABLE_FREE). See the comment
+ * below 'ifdef CONFIG_MMU_GATHER_RCU_TABLE_FREE' in include/asm-generic/tlb.h
  * for more details.
  */
 static inline void __tlb_remove_table(void *table)

include/asm-generic/tlb.h

@@ -126,7 +126,7 @@
  *  This ensures we call tlb_flush() every time tlb_change_page_size() actually
  *  changes the size and provides mmu_gather::page_size to tlb_flush().
  *
- *  HAVE_RCU_TABLE_FREE
+ *  MMU_GATHER_RCU_TABLE_FREE
  *
  *  This provides tlb_remove_table(), to be used instead of tlb_remove_page()
  *  for page directores (__p*_free_tlb()). This provides separate freeing of
@@ -142,7 +142,7 @@
  *  Use this if your architecture lacks an efficient flush_tlb_range().
  */
 
-#ifdef CONFIG_HAVE_RCU_TABLE_FREE
+#ifdef CONFIG_MMU_GATHER_RCU_TABLE_FREE
 /*
  * Semi RCU freeing of the page directories.
  *
@@ -193,10 +193,10 @@ extern void tlb_remove_table(struct mmu_gather *tlb, void *table);
 #else
 
 #ifdef tlb_needs_table_invalidate
-#error tlb_needs_table_invalidate() requires HAVE_RCU_TABLE_FREE
+#error tlb_needs_table_invalidate() requires MMU_GATHER_RCU_TABLE_FREE
 #endif
 
-#endif /* CONFIG_HAVE_RCU_TABLE_FREE */
+#endif /* CONFIG_MMU_GATHER_RCU_TABLE_FREE */
 
 
 #ifndef CONFIG_HAVE_MMU_GATHER_NO_GATHER
@@ -235,7 +235,7 @@ extern bool __tlb_remove_page_size(struct mmu_gather *tlb, struct page *page,
 struct mmu_gather {
 	struct mm_struct	*mm;
 
-#ifdef CONFIG_HAVE_RCU_TABLE_FREE
+#ifdef CONFIG_MMU_GATHER_RCU_TABLE_FREE
 	struct mmu_table_batch	*batch;
 #endif
 

mm/gup.c

@@ -1792,7 +1792,7 @@ EXPORT_SYMBOL(get_user_pages_unlocked);
  * Before activating this code, please be aware that the following assumptions
  * are currently made:
  *
- *  *) Either HAVE_RCU_TABLE_FREE is enabled, and tlb_remove_table() is used to
+ *  *) Either MMU_GATHER_RCU_TABLE_FREE is enabled, and tlb_remove_table() is used to
  *  free pages containing page tables or TLB flushing requires IPI broadcast.
  *
  *  *) ptes can be read atomically by the architecture.

mm/mmu_gather.c

@@ -91,7 +91,7 @@ bool __tlb_remove_page_size(struct mmu_gather *tlb, struct page *page, int page_
 
 #endif /* HAVE_MMU_GATHER_NO_GATHER */
 
-#ifdef CONFIG_HAVE_RCU_TABLE_FREE
+#ifdef CONFIG_MMU_GATHER_RCU_TABLE_FREE
 
 /*
  * See the comment near struct mmu_table_batch.
@@ -173,11 +173,11 @@ void tlb_remove_table(struct mmu_gather *tlb, void *table)
 		tlb_table_flush(tlb);
 }
 
-#endif /* CONFIG_HAVE_RCU_TABLE_FREE */
+#endif /* CONFIG_MMU_GATHER_RCU_TABLE_FREE */
 
 static void tlb_flush_mmu_free(struct mmu_gather *tlb)
 {
-#ifdef CONFIG_HAVE_RCU_TABLE_FREE
+#ifdef CONFIG_MMU_GATHER_RCU_TABLE_FREE
 	tlb_table_flush(tlb);
 #endif
 #ifndef CONFIG_HAVE_MMU_GATHER_NO_GATHER
@@ -220,7 +220,7 @@ void tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm,
 	tlb->batch_count = 0;
 #endif
 
-#ifdef CONFIG_HAVE_RCU_TABLE_FREE
+#ifdef CONFIG_MMU_GATHER_RCU_TABLE_FREE
 	tlb->batch = NULL;
 #endif
 #ifdef CONFIG_HAVE_MMU_GATHER_PAGE_SIZE