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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2016-01-11 17:15:58 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2016-02-08 15:47:28 +0000 |
| commit | 2841029393fad551b49b6de34d44bfa9ef256441 (patch) | |
| tree | 8e4d1040e2a6cba7a1a09729abad19fe7c0a50c8 | |
| parent | 9023cc8268c6ba358417d31112ed96e1feb73e56 (diff) | |
| download | linux-2841029393fad551b49b6de34d44bfa9ef256441.tar.gz | |
ARM: make virt_to_idmap() return unsigned long
Make virt_to_idmap() return an unsigned long rather than phys_addr_t. Returning phys_addr_t here makes no sense, because the definition of virt_to_idmap() is that it shall return a physical address which maps identically with the virtual address. Since virtual addresses are limited to 32-bit, identity mapped physical addresses are as well. Almost all users already had an implicit narrowing cast to unsigned long so let's make this official and part of this interface. Tested-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| -rw-r--r-- | arch/arm/include/asm/memory.h | 6 | ||||
| -rw-r--r-- | arch/arm/kernel/reboot.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-keystone/keystone.c | 2 | ||||
| -rw-r--r-- | arch/arm/mm/idmap.c | 2 |
4 files changed, 6 insertions, 6 deletions
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h index c79b57bf71c4..49bf6b1e2177 100644 --- a/arch/arm/include/asm/memory.h +++ b/arch/arm/include/asm/memory.h @@ -273,14 +273,14 @@ static inline void *phys_to_virt(phys_addr_t x) #define __va(x) ((void *)__phys_to_virt((phys_addr_t)(x))) #define pfn_to_kaddr(pfn) __va((phys_addr_t)(pfn) << PAGE_SHIFT) -extern phys_addr_t (*arch_virt_to_idmap)(unsigned long x); +extern unsigned long (*arch_virt_to_idmap)(unsigned long x); /* * These are for systems that have a hardware interconnect supported alias of * physical memory for idmap purposes. Most cases should leave these - * untouched. + * untouched. Note: this can only return addresses less than 4GiB. */ -static inline phys_addr_t __virt_to_idmap(unsigned long x) +static inline unsigned long __virt_to_idmap(unsigned long x) { if (IS_ENABLED(CONFIG_MMU) && arch_virt_to_idmap) return arch_virt_to_idmap(x); diff --git a/arch/arm/kernel/reboot.c b/arch/arm/kernel/reboot.c index 38269358fd25..71a2ff9ec490 100644 --- a/arch/arm/kernel/reboot.c +++ b/arch/arm/kernel/reboot.c @@ -50,7 +50,7 @@ static void __soft_restart(void *addr) flush_cache_all(); /* Switch to the identity mapping. */ - phys_reset = (phys_reset_t)(unsigned long)virt_to_idmap(cpu_reset); + phys_reset = (phys_reset_t)virt_to_idmap(cpu_reset); phys_reset((unsigned long)addr); /* Should never get here. */ diff --git a/arch/arm/mach-keystone/keystone.c b/arch/arm/mach-keystone/keystone.c index c279293f084c..d80879ce4963 100644 --- a/arch/arm/mach-keystone/keystone.c +++ b/arch/arm/mach-keystone/keystone.c @@ -63,7 +63,7 @@ static void __init keystone_init(void) of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); } -static phys_addr_t keystone_virt_to_idmap(unsigned long x) +static unsigned long keystone_virt_to_idmap(unsigned long x) { return (phys_addr_t)(x) - CONFIG_PAGE_OFFSET + KEYSTONE_LOW_PHYS_START; } diff --git a/arch/arm/mm/idmap.c b/arch/arm/mm/idmap.c index d65909697165..bd274a05b8ff 100644 --- a/arch/arm/mm/idmap.c +++ b/arch/arm/mm/idmap.c @@ -15,7 +15,7 @@ * page tables. */ pgd_t *idmap_pgd; -phys_addr_t (*arch_virt_to_idmap) (unsigned long x); +unsigned long (*arch_virt_to_idmap)(unsigned long x); #ifdef CONFIG_ARM_LPAE static void idmap_add_pmd(pud_t *pud, unsigned long addr, unsigned long end, |