Merge tag 'asm-generic-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd...

[sfrench/cifs-2.6.git] / include / asm-generic / io.h

diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index 7197e0642757b3f8591eec28611f87287cca063f..a68f8fbf423bea0e0e8c13c2fc6b2aa1d81a6bf8 100644 (file)
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -1047,7 +1047,34 @@ static inline void iounmap(volatile void __iomem *addr)
 #elif defined(CONFIG_GENERIC_IOREMAP)
 #include <linux/pgtable.h>
 
-void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot);
+/*
+ * 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 *ioremap_prot(phys_addr_t phys_addr, size_t size,
+                          unsigned long prot);
 void iounmap(volatile void __iomem *addr);
 
 static inline void __iomem *ioremap(phys_addr_t addr, size_t size)
@@ -1194,9 +1221,7 @@ static inline void memcpy_toio(volatile void __iomem *addr, const void *buffer,
 }
 #endif
 
-#ifndef CONFIG_GENERIC_DEVMEM_IS_ALLOWED
 extern int devmem_is_allowed(unsigned long pfn);
-#endif
 
 #endif /* __KERNEL__ */