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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2016-03-15 18:00:30 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2016-05-03 13:17:28 +0300 |
| commit | 07a7056ccce3ffdb65908bf502aeb2503714da46 (patch) | |
| tree | b279010101294be5e39e682771dd118c6276b23f | |
| parent | d0506a2395eb07bef248de95016d9a8cf8a465ea (diff) | |
| download | linux-07a7056ccce3ffdb65908bf502aeb2503714da46.tar.xz | |
ARM: provide arm_has_idmap_alias() helper
Provide a helper to indicate whether we need to perform special handling
for boot identity mapping aliases or not.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: Pratyush Anand <panand@redhat.com>
| -rw-r--r-- | arch/arm/include/asm/memory.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h index ca208335fde6..31c07a2cc100 100644 --- a/arch/arm/include/asm/memory.h +++ b/arch/arm/include/asm/memory.h @@ -295,6 +295,11 @@ extern long long arch_phys_to_idmap_offset; * of physical memory for idmap purposes. Most cases should leave these * untouched. Note: this can only return addresses less than 4GiB. */ +static inline bool arm_has_idmap_alias(void) +{ + return IS_ENABLED(CONFIG_MMU) && arch_phys_to_idmap_offset != 0; +} + #define IDMAP_INVALID_ADDR ((u32)~0) static inline unsigned long phys_to_idmap(phys_addr_t addr) |