Patch "mm/gup: Remove the 'write' parameter from gup_fast_permitted()" has been added to the 5.0-stable tree

Patch "mm/gup: Remove the 'write' parameter from gup_fast_permitted()" has been added to the 5.0-stable tree

[gregkh]

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

    mm/gup: Remove the 'write' parameter from gup_fast_permitted()

to the 5.0-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:
     mm-gup-remove-the-write-parameter-from-gup_fast_permitted.patch
and it can be found in the queue-5.0 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 ad8cfb9c42ef83ecf4079bc7d77e6557648e952b Mon Sep 17 00:00:00 2001
From: Ira Weiny <ira.weiny@intel.com>
Date: Sun, 10 Feb 2019 14:34:24 -0800
Subject: mm/gup: Remove the 'write' parameter from gup_fast_permitted()

From: Ira Weiny <ira.weiny@intel.com>

commit ad8cfb9c42ef83ecf4079bc7d77e6557648e952b upstream.

The 'write' parameter is unused in gup_fast_permitted() so remove it.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20190210223424.13934-1-ira.weiny@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Justin Forbes <jmforbes@linuxtx.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/x86/include/asm/pgtable_64.h |    3 +--
 mm/gup.c                          |    6 +++---
 2 files changed, 4 insertions(+), 5 deletions(-)

--- a/arch/x86/include/asm/pgtable_64.h
+++ b/arch/x86/include/asm/pgtable_64.h
@@ -259,8 +259,7 @@ extern void init_extra_mapping_uc(unsign
 extern void init_extra_mapping_wb(unsigned long phys, unsigned long size);
 
 #define gup_fast_permitted gup_fast_permitted
-static inline bool gup_fast_permitted(unsigned long start, int nr_pages,
-		int write)
+static inline bool gup_fast_permitted(unsigned long start, int nr_pages)
 {
 	unsigned long len, end;
 
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1811,7 +1811,7 @@ static void gup_pgd_range(unsigned long
  * Check if it's allowed to use __get_user_pages_fast() for the range, or
  * we need to fall back to the slow version:
  */
-bool gup_fast_permitted(unsigned long start, int nr_pages, int write)
+bool gup_fast_permitted(unsigned long start, int nr_pages)
 {
 	unsigned long len, end;
 
@@ -1853,7 +1853,7 @@ int __get_user_pages_fast(unsigned long
 	 * block IPIs that come from THPs splitting.
 	 */
 
-	if (gup_fast_permitted(start, nr_pages, write)) {
+	if (gup_fast_permitted(start, nr_pages)) {
 		local_irq_save(flags);
 		gup_pgd_range(start, end, write, pages, &nr);
 		local_irq_restore(flags);
@@ -1895,7 +1895,7 @@ int get_user_pages_fast(unsigned long st
 	if (unlikely(!access_ok((void __user *)start, len)))
 		return -EFAULT;
 
-	if (gup_fast_permitted(start, nr_pages, write)) {
+	if (gup_fast_permitted(start, nr_pages)) {
 		local_irq_disable();
 		gup_pgd_range(addr, end, write, pages, &nr);
 		local_irq_enable();


Patches currently in stable-queue which might be from ira.weiny@intel.com are

queue-5.0/mm-gup-remove-the-write-parameter-from-gup_fast_permitted.patch