From: Nitin Gupta <nitin.m.gupta@oracle.com>
Date: Fri, 3 Mar 2017 19:04:00 +0000 (-0800)
Subject: sparc64: Fix build error in flush_tsb_user_page
X-Git-Tag: v4.1.12-98.0.20170517_2143~33^2~21
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=a6695226d22aaeeac3e5ab396e15cf16e2dcc221;p=users%2Fjedix%2Flinux-maple.git

sparc64: Fix build error in flush_tsb_user_page

Patch "sparc64: Add 64K page size support"
unconditionally used __flush_huge_tsb_one_entry()
which is available only when hugetlb support is
enabled.

Another issue was incorrect TSB flushing for 64K
pages in flush_tsb_user().

Orabug: 25704426

Signed-off-by: Nitin Gupta <nitin.m.gupta@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Allen Pais <allen.pais@oracle.com>
---

diff --git a/arch/sparc/mm/hugetlbpage.c b/arch/sparc/mm/hugetlbpage.c
index 28b66af09f5dc..8c8559e64f3e0 100644
--- a/arch/sparc/mm/hugetlbpage.c
+++ b/arch/sparc/mm/hugetlbpage.c
@@ -322,7 +322,7 @@ void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
 
 	addr &= ~(size - 1);
 	orig = *ptep;
-	orig_shift = pte_none(orig) ? PAGE_SIZE : huge_tte_to_shift(orig);
+	orig_shift = pte_none(orig) ? PAGE_SHIFT : huge_tte_to_shift(orig);
 
 	for (i = 0; i < nptes; i++)
 		ptep[i] = __pte(pte_val(entry) + (i << shift));
@@ -348,7 +348,8 @@ pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
 	else
 		nptes = size >> PAGE_SHIFT;
 
-	hugepage_shift = pte_none(entry) ? PAGE_SHIFT : huge_tte_to_shift(entry);
+	hugepage_shift = pte_none(entry) ? PAGE_SHIFT :
+		huge_tte_to_shift(entry);
 
 	if (pte_present(entry))
 		mm->context.hugetlb_pte_count -= nptes;
diff --git a/arch/sparc/mm/tsb.c b/arch/sparc/mm/tsb.c
index d0aa02268b629..b5d829afbda60 100644
--- a/arch/sparc/mm/tsb.c
+++ b/arch/sparc/mm/tsb.c
@@ -121,12 +121,18 @@ void flush_tsb_user(struct tlb_batch *tb)
 
 	spin_lock_irqsave(&mm->context.lock, flags);
 
-	if (tb->hugepage_shift == PAGE_SHIFT) {
+	if (tb->hugepage_shift < HPAGE_SHIFT) {
 		base = (unsigned long) mm->context.tsb_block[MM_TSB_BASE].tsb;
 		nentries = mm->context.tsb_block[MM_TSB_BASE].tsb_nentries;
 		if (tlb_type == cheetah_plus || tlb_type == hypervisor)
 			base = __pa(base);
-		__flush_tsb_one(tb, PAGE_SHIFT, base, nentries);
+		if (tb->hugepage_shift == PAGE_SHIFT)
+			__flush_tsb_one(tb, PAGE_SHIFT, base, nentries);
+#if defined(CONFIG_HUGETLB_PAGE)
+		else
+			__flush_huge_tsb_one(tb, PAGE_SHIFT, base, nentries,
+					     tb->hugepage_shift);
+#endif
 	}
 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
 	else if (mm->context.tsb_block[MM_TSB_HUGE].tsb) {
@@ -153,8 +159,14 @@ void flush_tsb_user_page(struct mm_struct *mm, unsigned long vaddr,
 		nentries = mm->context.tsb_block[MM_TSB_BASE].tsb_nentries;
 		if (tlb_type == cheetah_plus || tlb_type == hypervisor)
 			base = __pa(base);
-		__flush_huge_tsb_one_entry(base, vaddr, PAGE_SHIFT, nentries,
-					   hugepage_shift);
+		if (hugepage_shift == PAGE_SHIFT)
+			__flush_tsb_one_entry(base, vaddr, PAGE_SHIFT,
+					      nentries);
+#if defined(CONFIG_HUGETLB_PAGE)
+		else
+			__flush_huge_tsb_one_entry(base, vaddr, PAGE_SHIFT,
+						   nentries, hugepage_shift);
+#endif
 	}
 #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE)
 	else if (mm->context.tsb_block[MM_TSB_HUGE].tsb) {