[PATCH 5.0 019/139] mm/gup: Remove the write parameter from gup_fast_permitted()

[Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>]

From: Ira Weiny <ira.weiny@xxxxxxxxx>

commit ad8cfb9c42ef83ecf4079bc7d77e6557648e952b upstream.

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

Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>
Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Reviewed-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: linux-mm@xxxxxxxxx
Link: http://lkml.kernel.org/r/20190210223424.13934-1-ira.weiny@xxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Justin Forbes <jmforbes@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 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();