tlb: mmu_gather: Remove start/end arguments from tlb_gather_mmu()

The 'start' and 'end' arguments to tlb_gather_mmu() are no longer
needed now that there is a separate function for 'fullmm' flushing.

Remove the unused arguments and update all callers.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Yu Zhao <yuzhao@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/CAHk-=wjQWa14_4UpfDf=fiineNP+RH74kZeDMo_f1D35xNzq9w@mail.gmail.com

1 files changed, 8 insertions, 14 deletions

diff --git a/mm/mmu_gather.c b/mm/mmu_gather.c
index 5f5e45d9eb50..0dc7149b0c61 100644
--- a/mm/mmu_gather.c
+++ b/mm/mmu_gather.c
@@ -253,21 +253,17 @@ void tlb_flush_mmu(struct mmu_gather *tlb)
  * tlb_gather_mmu - initialize an mmu_gather structure for page-table tear-down
  * @tlb: the mmu_gather structure to initialize
  * @mm: the mm_struct of the target address space
- * @start: start of the region that will be removed from the page-table
- * @end: end of the region that will be removed from the page-table
+ * @fullmm: @mm is without users and we're going to destroy the full address
+ *	    space (exit/execve)
  *
  * Called to initialize an (on-stack) mmu_gather structure for page-table
- * tear-down from @mm. The @start and @end are set to 0 and -1
- * respectively when @mm is without users and we're going to destroy
- * the full address space (exit/execve).
+ * tear-down from @mm.
  */
 static void __tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm,
-			     unsigned long start, unsigned long end)
+			     bool fullmm)
 {
 	tlb->mm = mm;
-
-	/* Is it from 0 to ~0? */
-	tlb->fullmm     = !(start | (end+1));
+	tlb->fullmm = fullmm;
 
 #ifndef CONFIG_MMU_GATHER_NO_GATHER
 	tlb->need_flush_all = 0;
@@ -287,16 +283,14 @@ static void __tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm,
 	inc_tlb_flush_pending(tlb->mm);
 }
 
-void tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm,
-		    unsigned long start, unsigned long end)
+void tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm)
 {
-	WARN_ON(!(start | (end + 1))); /* Use _fullmm() instead */
-	__tlb_gather_mmu(tlb, mm, start, end);
+	__tlb_gather_mmu(tlb, mm, false);
 }
 
 void tlb_gather_mmu_fullmm(struct mmu_gather *tlb, struct mm_struct *mm)
 {
-	__tlb_gather_mmu(tlb, mm, 0, -1);
+	__tlb_gather_mmu(tlb, mm, true);
 }
 
 /**