arm64: Simplify NR_FIX_BTMAPS calculation

We choose NR_FIX_BTMAPS such that each slot (NR_FIX_BTMAPS * PAGE_SIZE)
can address 256K.

Use division to derive NR_FIX_BTMAPS rather than defining it for each
page size.

Signed-off-by:  Mark Rutland <mark.rutland@arm.com>
Signed-off-by:  Suzuki K. Poulose <suzuki.poulose@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

diff --git a/arch/arm64/include/asm/fixmap.h b/arch/arm64/include/asm/fixmap.h
index 8b9884c726adc78f37eb59e7288298267bec55b4..309704544d22763d6348095814fbdce935172c1b 100644 (file)
--- a/arch/arm64/include/asm/fixmap.h
+++ b/arch/arm64/include/asm/fixmap.h
@@ -17,6 +17,7 @@
 
 #ifndef __ASSEMBLY__
 #include <linux/kernel.h>
+#include <linux/sizes.h>
 #include <asm/boot.h>
 #include <asm/page.h>
 
@@ -55,11 +56,7 @@ enum fixed_addresses {
         * Temporary boot-time mappings, used by early_ioremap(),
         * before ioremap() is functional.
         */
-#ifdef CONFIG_ARM64_64K_PAGES
-#define NR_FIX_BTMAPS          4
-#else
-#define NR_FIX_BTMAPS          64
-#endif
+#define NR_FIX_BTMAPS          (SZ_256K / PAGE_SIZE)
 #define FIX_BTMAPS_SLOTS       7
 #define TOTAL_FIX_BTMAPS       (NR_FIX_BTMAPS * FIX_BTMAPS_SLOTS)