[v4,16/16] mm: ioremap: remove unneeded ioremap_allowed and iounmap_allowed

Commit Message

Baoquan He Feb. 16, 2023, 12:34 p.m. UTC

Now there are no users of ioremap_allowed and iounmap_allowed, clean
them up.

Signed-off-by: Baoquan He <[e-mail]>
---
 include/asm-generic/io.h | 26 --------------------------
 mm/ioremap.c             |  6 ------
 2 files changed, 32 deletions(-)

Patch

diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index 29ee791164ac..c13109d17dcb 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -1047,32 +1047,6 @@  static inline void iounmap(volatile void __iomem *addr)
 #elif defined(CONFIG_GENERIC_IOREMAP)
 #include <linux/pgtable.h>
 
-/*
- * Arch code can implement the following two hooks when using GENERIC_IOREMAP
- * ioremap_allowed() return a bool,
- *   - true means continue to remap
- *   - false means skip remap and return directly
- * iounmap_allowed() return a bool,
- *   - true means continue to vunmap
- *   - false means skip vunmap and return directly
- */
-#ifndef ioremap_allowed
-#define ioremap_allowed ioremap_allowed
-static inline bool ioremap_allowed(phys_addr_t phys_addr, size_t size,
-				   unsigned long prot)
-{
-	return true;
-}
-#endif
-
-#ifndef iounmap_allowed
-#define iounmap_allowed iounmap_allowed
-static inline bool iounmap_allowed(void *addr)
-{
-	return true;
-}
-#endif
-
 void __iomem *generic_ioremap_prot(phys_addr_t phys_addr, size_t size,
 				   pgprot_t prot);
 
diff --git a/mm/ioremap.c b/mm/ioremap.c
index 4a7749d85044..8cb337446bba 100644
--- a/mm/ioremap.c
+++ b/mm/ioremap.c
@@ -32,9 +32,6 @@  void __iomem *generic_ioremap_prot(phys_addr_t phys_addr, size_t size,
 	phys_addr -= offset;
 	size = PAGE_ALIGN(size + offset);
 
-	if (!ioremap_allowed(phys_addr, size, pgprot_val(prot)))
-		return NULL;
-
 #ifdef IOREMAP_START
 	area = __get_vm_area_caller(size, VM_IOREMAP, IOREMAP_START,
 				    IOREMAP_END, __builtin_return_address(0));
@@ -68,9 +65,6 @@  void generic_iounmap(volatile void __iomem *addr)
 {
 	void *vaddr = (void *)((unsigned long)addr & PAGE_MASK);
 
-	if (!iounmap_allowed(vaddr))
-		return;
-
 	if (is_ioremap_addr(vaddr))
 		vunmap(vaddr);
 }