asm-generic/tlb: rename HAVE_MMU_GATHER_PAGE_SIZE

Towards a more consistent naming scheme.

Link: http://lkml.kernel.org/r/20200116064531.483522-8-aneesh.kumar@linux.ibm.com
Signed-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

@@ -396,7 +396,7 @@ config HAVE_ARCH_JUMP_LABEL_RELATIVE
 config MMU_GATHER_RCU_TABLE_FREE
 	bool
 
-config HAVE_MMU_GATHER_PAGE_SIZE
+config MMU_GATHER_PAGE_SIZE
 	bool
 
 config MMU_GATHER_NO_RANGE

arch/powerpc/Kconfig

@@ -223,7 +223,7 @@ config PPC
 	select HAVE_PERF_REGS
 	select HAVE_PERF_USER_STACK_DUMP
 	select MMU_GATHER_RCU_TABLE_FREE
-	select HAVE_MMU_GATHER_PAGE_SIZE
+	select MMU_GATHER_PAGE_SIZE
 	select HAVE_REGS_AND_STACK_ACCESS_API
 	select HAVE_RELIABLE_STACKTRACE		if PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN
 	select HAVE_SYSCALL_TRACEPOINTS

include/asm-generic/tlb.h

@@ -121,11 +121,14 @@
  *
  * Additionally there are a few opt-in features:
  *
- *  HAVE_MMU_GATHER_PAGE_SIZE
+ *  MMU_GATHER_PAGE_SIZE
  *
  *  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().
  *
+ *  This might be useful if your architecture has size specific TLB
+ *  invalidation instructions.
+ *
  *  MMU_GATHER_RCU_TABLE_FREE
  *
  *  This provides tlb_remove_table(), to be used instead of tlb_remove_page()
@@ -279,7 +282,7 @@ struct mmu_gather {
 	struct mmu_gather_batch	local;
 	struct page		*__pages[MMU_GATHER_BUNDLE];
 
-#ifdef CONFIG_HAVE_MMU_GATHER_PAGE_SIZE
+#ifdef CONFIG_MMU_GATHER_PAGE_SIZE
 	unsigned int page_size;
 #endif
 #endif
@@ -435,7 +438,7 @@ static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
 static inline void tlb_change_page_size(struct mmu_gather *tlb,
 						     unsigned int page_size)
 {
-#ifdef CONFIG_HAVE_MMU_GATHER_PAGE_SIZE
+#ifdef CONFIG_MMU_GATHER_PAGE_SIZE
 	if (tlb->page_size && tlb->page_size != page_size) {
 		if (!tlb->fullmm && !tlb->need_flush_all)
 			tlb_flush_mmu(tlb);

mm/mmu_gather.c

@@ -69,7 +69,7 @@ bool __tlb_remove_page_size(struct mmu_gather *tlb, struct page *page, int page_
 
 	VM_BUG_ON(!tlb->end);
 
-#ifdef CONFIG_HAVE_MMU_GATHER_PAGE_SIZE
+#ifdef CONFIG_MMU_GATHER_PAGE_SIZE
 	VM_WARN_ON(tlb->page_size != page_size);
 #endif
 
@@ -223,7 +223,7 @@ void tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm,
 #ifdef CONFIG_MMU_GATHER_RCU_TABLE_FREE
 	tlb->batch = NULL;
 #endif
-#ifdef CONFIG_HAVE_MMU_GATHER_PAGE_SIZE
+#ifdef CONFIG_MMU_GATHER_PAGE_SIZE
 	tlb->page_size = 0;
 #endif