[tip:x86/mm] mm/gup: Remove the 'write' parameter from gup_fast_permitted()

[tip-bot for Ira Weiny <tipbot@zytor.com>]

Commit-ID:  ad8cfb9c42ef83ecf4079bc7d77e6557648e952b
Gitweb:     https://git.kernel.org/tip/ad8cfb9c42ef83ecf4079bc7d77e6557648e952b
Author:     Ira Weiny <ira.weiny@intel.com>
AuthorDate: Sun, 10 Feb 2019 14:34:24 -0800
Committer:  Ingo Molnar <mingo@kernel.org>
CommitDate: Mon, 11 Feb 2019 08:20:40 +0100

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

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

diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h
index 9c85b54bf03c..0bb566315621 100644
--- 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(unsigned long phys, unsigned long size);
 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;
 
diff --git a/mm/gup.c b/mm/gup.c
index 05acd7e2eb22..b63e88eca31b 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1786,7 +1786,7 @@ static void gup_pgd_range(unsigned long addr, unsigned long end,
  * 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;
 
@@ -1828,7 +1828,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write,
 	 * 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);
@@ -1870,7 +1870,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, int write,
 	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();