aboutsummaryrefslogtreecommitdiff
path: root/arch/arm/mm/ioremap.c
diff options
context:
space:
mode:
authorRob Herring <rob.herring@calxeda.com>2012-02-10 17:05:13 -0600
committerRob Herring <rob.herring@calxeda.com>2012-03-06 21:22:01 -0600
commit4fe7ef3a0811c33137ace0ed424dd0c01dd2d75e (patch)
tree046a63d0c5db517529e86c914bb2fb493a4adee6 /arch/arm/mm/ioremap.c
parent47168824fa71b52ca3f4c18ddf0c42ff35192235 (diff)
ARM: provide runtime hook for ioremap/iounmap
We have compile time over-ride of ioremap and iounmap, but an run-time override is needed for multi-platform builds. This adds an extra function pointer check, but ioremap is not peformance critical. The option for compile time selection remains. The caller variant is used here to provide correct caller information as ARM can only support level 0 for __builtin_return_address. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Cc: Russell King <linux@arm.linux.org.uk> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Nicolas Pitre <nico@linaro.org>
Diffstat (limited to 'arch/arm/mm/ioremap.c')
-rw-r--r--arch/arm/mm/ioremap.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/arch/arm/mm/ioremap.c b/arch/arm/mm/ioremap.c
index 80632e8d753..024629046f1 100644
--- a/arch/arm/mm/ioremap.c
+++ b/arch/arm/mm/ioremap.c
@@ -306,11 +306,15 @@ __arm_ioremap_pfn(unsigned long pfn, unsigned long offset, size_t size,
}
EXPORT_SYMBOL(__arm_ioremap_pfn);
+void __iomem * (*arch_ioremap_caller)(unsigned long, size_t,
+ unsigned int, void *) =
+ __arm_ioremap_caller;
+
void __iomem *
__arm_ioremap(unsigned long phys_addr, size_t size, unsigned int mtype)
{
- return __arm_ioremap_caller(phys_addr, size, mtype,
- __builtin_return_address(0));
+ return arch_ioremap_caller(phys_addr, size, mtype,
+ __builtin_return_address(0));
}
EXPORT_SYMBOL(__arm_ioremap);
@@ -369,4 +373,11 @@ void __iounmap(volatile void __iomem *io_addr)
vunmap(addr);
}
-EXPORT_SYMBOL(__iounmap);
+
+void (*arch_iounmap)(volatile void __iomem *) = __iounmap;
+
+void __arm_iounmap(volatile void __iomem *io_addr)
+{
+ arch_iounmap(io_addr);
+}
+EXPORT_SYMBOL(__arm_iounmap);