mm: mark fault_around_bytes __read_mostly

fault_around_bytes can only be changed via debugfs. Let's mark it read-mostly. Signed-off-by: Kirill A. Shutemov <[email protected]> Suggested-by: David Rientjes <[email protected]> Acked-by: David Rientjes <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Andrey Ryabinin <[email protected]> Cc: Sasha Levin <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
josf · Aug 7, 2014 · 3a91053 · 3a91053
1 parent aecd6f4
commit 3a91053
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/mm/memory.c b/mm/memory.c
@@ -2766,7 +2766,8 @@ void do_set_pte(struct vm_area_struct *vma, unsigned long address,
 	update_mmu_cache(vma, address, pte);
 }
 
-static unsigned long fault_around_bytes = rounddown_pow_of_two(65536);
+static unsigned long fault_around_bytes __read_mostly =
+	rounddown_pow_of_two(65536);
 
 #ifdef CONFIG_DEBUG_FS
 static int fault_around_bytes_get(void *data, u64 *val)