mm: remove the second argument of k[un]map_atomic()

Signed-off-by: NCong Wang <amwang@redhat.com>

mm/bounce.c

@@ -50,9 +50,9 @@ static void bounce_copy_vec(struct bio_vec *to, unsigned char *vfrom)
 	unsigned char *vto;
 
 	local_irq_save(flags);
-	vto = kmap_atomic(to->bv_page, KM_BOUNCE_READ);
+	vto = kmap_atomic(to->bv_page);
 	memcpy(vto + to->bv_offset, vfrom, to->bv_len);
-	kunmap_atomic(vto, KM_BOUNCE_READ);
+	kunmap_atomic(vto);
 	local_irq_restore(flags);
 }
 

mm/filemap.c

@@ -1318,10 +1318,10 @@ int file_read_actor(read_descriptor_t *desc, struct page *page,
 	 * taking the kmap.
 	 */
 	if (!fault_in_pages_writeable(desc->arg.buf, size)) {
-		kaddr = kmap_atomic(page, KM_USER0);
+		kaddr = kmap_atomic(page);
 		left = __copy_to_user_inatomic(desc->arg.buf,
 						kaddr + offset, size);
-		kunmap_atomic(kaddr, KM_USER0);
+		kunmap_atomic(kaddr);
 		if (left == 0)
 			goto success;
 	}
@@ -2045,7 +2045,7 @@ size_t iov_iter_copy_from_user_atomic(struct page *page,
 	size_t copied;
 
 	BUG_ON(!in_atomic());
-	kaddr = kmap_atomic(page, KM_USER0);
+	kaddr = kmap_atomic(page);
 	if (likely(i->nr_segs == 1)) {
 		int left;
 		char __user *buf = i->iov->iov_base + i->iov_offset;
@@ -2055,7 +2055,7 @@ size_t iov_iter_copy_from_user_atomic(struct page *page,
 		copied = __iovec_copy_from_user_inatomic(kaddr + offset,
 						i->iov, i->iov_offset, bytes);
 	}
-	kunmap_atomic(kaddr, KM_USER0);
+	kunmap_atomic(kaddr);
 
 	return copied;
 }

mm/ksm.c

@@ -672,9 +672,9 @@ static int unmerge_and_remove_all_rmap_items(void)
 static u32 calc_checksum(struct page *page)
 {
 	u32 checksum;
-	void *addr = kmap_atomic(page, KM_USER0);
+	void *addr = kmap_atomic(page);
 	checksum = jhash2(addr, PAGE_SIZE / 4, 17);
-	kunmap_atomic(addr, KM_USER0);
+	kunmap_atomic(addr);
 	return checksum;
 }
 
@@ -683,11 +683,11 @@ static int memcmp_pages(struct page *page1, struct page *page2)
 	char *addr1, *addr2;
 	int ret;
 
-	addr1 = kmap_atomic(page1, KM_USER0);
-	addr2 = kmap_atomic(page2, KM_USER1);
+	addr1 = kmap_atomic(page1);
+	addr2 = kmap_atomic(page2);
 	ret = memcmp(addr1, addr2, PAGE_SIZE);
-	kunmap_atomic(addr2, KM_USER1);
-	kunmap_atomic(addr1, KM_USER0);
+	kunmap_atomic(addr2);
+	kunmap_atomic(addr1);
 	return ret;
 }
 

mm/memory.c

@@ -2447,7 +2447,7 @@ static inline void cow_user_page(struct page *dst, struct page *src, unsigned lo
 	 * fails, we just zero-fill it. Live with it.
 	 */
 	if (unlikely(!src)) {
-		void *kaddr = kmap_atomic(dst, KM_USER0);
+		void *kaddr = kmap_atomic(dst);
 		void __user *uaddr = (void __user *)(va & PAGE_MASK);
 
 		/*
@@ -2458,7 +2458,7 @@ static inline void cow_user_page(struct page *dst, struct page *src, unsigned lo
 		 */
 		if (__copy_from_user_inatomic(kaddr, uaddr, PAGE_SIZE))
 			clear_page(kaddr);
-		kunmap_atomic(kaddr, KM_USER0);
+		kunmap_atomic(kaddr);
 		flush_dcache_page(dst);
 	} else
 		copy_user_highpage(dst, src, va, vma);

mm/shmem.c

@@ -1656,9 +1656,9 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s
 		}
 		inode->i_mapping->a_ops = &shmem_aops;
 		inode->i_op = &shmem_symlink_inode_operations;
-		kaddr = kmap_atomic(page, KM_USER0);
+		kaddr = kmap_atomic(page);
 		memcpy(kaddr, symname, len);
-		kunmap_atomic(kaddr, KM_USER0);
+		kunmap_atomic(kaddr);
 		set_page_dirty(page);
 		unlock_page(page);
 		page_cache_release(page);

mm/swapfile.c

@@ -2427,9 +2427,9 @@ int add_swap_count_continuation(swp_entry_t entry, gfp_t gfp_mask)
 		if (!(count & COUNT_CONTINUED))
 			goto out;
 
-		map = kmap_atomic(list_page, KM_USER0) + offset;
+		map = kmap_atomic(list_page) + offset;
 		count = *map;
-		kunmap_atomic(map, KM_USER0);
+		kunmap_atomic(map);
 
 		/*
 		 * If this continuation count now has some space in it,
@@ -2472,7 +2472,7 @@ static bool swap_count_continued(struct swap_info_struct *si,
 
 	offset &= ~PAGE_MASK;
 	page = list_entry(head->lru.next, struct page, lru);
-	map = kmap_atomic(page, KM_USER0) + offset;
+	map = kmap_atomic(page) + offset;
 
 	if (count == SWAP_MAP_MAX)	/* initial increment from swap_map */
 		goto init_map;		/* jump over SWAP_CONT_MAX checks */
@@ -2482,26 +2482,26 @@ static bool swap_count_continued(struct swap_info_struct *si,
 		 * Think of how you add 1 to 999
 		 */
 		while (*map == (SWAP_CONT_MAX | COUNT_CONTINUED)) {
-			kunmap_atomic(map, KM_USER0);
+			kunmap_atomic(map);
 			page = list_entry(page->lru.next, struct page, lru);
 			BUG_ON(page == head);
-			map = kmap_atomic(page, KM_USER0) + offset;
+			map = kmap_atomic(page) + offset;
 		}
 		if (*map == SWAP_CONT_MAX) {
-			kunmap_atomic(map, KM_USER0);
+			kunmap_atomic(map);
 			page = list_entry(page->lru.next, struct page, lru);
 			if (page == head)
 				return false;	/* add count continuation */
-			map = kmap_atomic(page, KM_USER0) + offset;
+			map = kmap_atomic(page) + offset;
 init_map:		*map = 0;		/* we didn't zero the page */
 		}
 		*map += 1;
-		kunmap_atomic(map, KM_USER0);
+		kunmap_atomic(map);
 		page = list_entry(page->lru.prev, struct page, lru);
 		while (page != head) {
-			map = kmap_atomic(page, KM_USER0) + offset;
+			map = kmap_atomic(page) + offset;
 			*map = COUNT_CONTINUED;
-			kunmap_atomic(map, KM_USER0);
+			kunmap_atomic(map);
 			page = list_entry(page->lru.prev, struct page, lru);
 		}
 		return true;			/* incremented */
@@ -2512,22 +2512,22 @@ init_map:		*map = 0;		/* we didn't zero the page */
 		 */
 		BUG_ON(count != COUNT_CONTINUED);
 		while (*map == COUNT_CONTINUED) {
-			kunmap_atomic(map, KM_USER0);
+			kunmap_atomic(map);
 			page = list_entry(page->lru.next, struct page, lru);
 			BUG_ON(page == head);
-			map = kmap_atomic(page, KM_USER0) + offset;
+			map = kmap_atomic(page) + offset;
 		}
 		BUG_ON(*map == 0);
 		*map -= 1;
 		if (*map == 0)
 			count = 0;
-		kunmap_atomic(map, KM_USER0);
+		kunmap_atomic(map);
 		page = list_entry(page->lru.prev, struct page, lru);
 		while (page != head) {
-			map = kmap_atomic(page, KM_USER0) + offset;
+			map = kmap_atomic(page) + offset;
 			*map = SWAP_CONT_MAX | count;
 			count = COUNT_CONTINUED;
-			kunmap_atomic(map, KM_USER0);
+			kunmap_atomic(map);
 			page = list_entry(page->lru.prev, struct page, lru);
 		}
 		return count == COUNT_CONTINUED;

mm/vmalloc.c

@@ -1906,9 +1906,9 @@ static int aligned_vread(char *buf, char *addr, unsigned long count)
 			 * we can expect USER0 is not used (see vread/vwrite's
 			 * function description)
 			 */
-			void *map = kmap_atomic(p, KM_USER0);
+			void *map = kmap_atomic(p);
 			memcpy(buf, map + offset, length);
-			kunmap_atomic(map, KM_USER0);
+			kunmap_atomic(map);
 		} else
 			memset(buf, 0, length);
 
@@ -1945,9 +1945,9 @@ static int aligned_vwrite(char *buf, char *addr, unsigned long count)
 			 * we can expect USER0 is not used (see vread/vwrite's
 			 * function description)
 			 */
-			void *map = kmap_atomic(p, KM_USER0);
+			void *map = kmap_atomic(p);
 			memcpy(map + offset, buf, length);
-			kunmap_atomic(map, KM_USER0);
+			kunmap_atomic(map);
 		}
 		addr += length;
 		buf += length;