Patch "arm64: hugetlb: fix the wrong address for several functions" has been added to the 4.9-stable tree

Patch "arm64: hugetlb: fix the wrong address for several functions" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    arm64: hugetlb: fix the wrong address for several functions

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     arm64-hugetlb-fix-the-wrong-address-for-several-functions.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 0c2f0afe3582c58efeef93bc57bc07d502132618 Mon Sep 17 00:00:00 2001
From: Huang Shijie <shijie.huang@arm.com>
Date: Tue, 8 Nov 2016 13:44:39 +0800
Subject: arm64: hugetlb: fix the wrong address for several functions

From: Huang Shijie <shijie.huang@arm.com>

commit 0c2f0afe3582c58efeef93bc57bc07d502132618 upstream.

The libhugetlbfs meets several failures since the following functions
do not use the correct address:
   huge_ptep_get_and_clear()
   huge_ptep_set_access_flags()
   huge_ptep_set_wrprotect()
   huge_ptep_clear_flush()

This patch fixes the wrong address for them.

Signed-off-by: Huang Shijie <shijie.huang@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/arm64/mm/hugetlbpage.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/arch/arm64/mm/hugetlbpage.c
+++ b/arch/arm64/mm/hugetlbpage.c
@@ -212,7 +212,7 @@ pte_t huge_ptep_get_and_clear(struct mm_
 		ncontig = find_num_contig(mm, addr, cpte, *cpte, &pgsize);
 		/* save the 1st pte to return */
 		pte = ptep_get_and_clear(mm, addr, cpte);
-		for (i = 1; i < ncontig; ++i) {
+		for (i = 1, addr += pgsize; i < ncontig; ++i, addr += pgsize) {
 			/*
 			 * If HW_AFDBM is enabled, then the HW could
 			 * turn on the dirty bit for any of the page
@@ -250,7 +250,7 @@ int huge_ptep_set_access_flags(struct vm
 		pfn = pte_pfn(*cpte);
 		ncontig = find_num_contig(vma->vm_mm, addr, cpte,
 					  *cpte, &pgsize);
-		for (i = 0; i < ncontig; ++i, ++cpte) {
+		for (i = 0; i < ncontig; ++i, ++cpte, addr += pgsize) {
 			changed = ptep_set_access_flags(vma, addr, cpte,
 							pfn_pte(pfn,
 								hugeprot),
@@ -273,7 +273,7 @@ void huge_ptep_set_wrprotect(struct mm_s
 
 		cpte = huge_pte_offset(mm, addr);
 		ncontig = find_num_contig(mm, addr, cpte, *cpte, &pgsize);
-		for (i = 0; i < ncontig; ++i, ++cpte)
+		for (i = 0; i < ncontig; ++i, ++cpte, addr += pgsize)
 			ptep_set_wrprotect(mm, addr, cpte);
 	} else {
 		ptep_set_wrprotect(mm, addr, ptep);
@@ -291,7 +291,7 @@ void huge_ptep_clear_flush(struct vm_are
 		cpte = huge_pte_offset(vma->vm_mm, addr);
 		ncontig = find_num_contig(vma->vm_mm, addr, cpte,
 					  *cpte, &pgsize);
-		for (i = 0; i < ncontig; ++i, ++cpte)
+		for (i = 0; i < ncontig; ++i, ++cpte, addr += pgsize)
 			ptep_clear_flush(vma, addr, cpte);
 	} else {
 		ptep_clear_flush(vma, addr, ptep);


Patches currently in stable-queue which might be from shijie.huang@arm.com are

queue-4.9/arm64-hugetlb-fix-the-wrong-address-for-several-functions.patch
queue-4.9/arm64-hugetlb-remove-the-wrong-pmd-check-in-find_num_contig.patch
queue-4.9/arm64-hugetlb-fix-the-wrong-return-value-for-huge_ptep_set_access_flags.patch