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ARM: fix __virt_to_idmap build error on !MMU 

Fengguang Wu reports that building ARM with !MMU results in the
following build error:

   arch/arm/kernel/built-in.o: In function `__soft_restart':
>> :(.text+0x1624): undefined reference to `arch_virt_to_idmap'

Fix this by adding an appropriate IS_ENABLED(CONFIG_MMU) into the
__virt_to_idmap() inline function.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2015-07-17 10:33:04 +01:00
parent bac51ad9d1
commit 0871b72481
1 changed files with 1 additions and 1 deletions
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2
arch/arm/include/asm/memory.h
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@ -286,7 +286,7 @@ extern phys_addr_t (*arch_virt_to_idmap)(unsigned long x);
*/
static inline phys_addr_t __virt_to_idmap(unsigned long x)
{
if (arch_virt_to_idmap)
if (IS_ENABLED(CONFIG_MMU) && arch_virt_to_idmap)
return arch_virt_to_idmap(x);
else
return __virt_to_phys(x);