[Crash-utility] [PATCH 1/3] Unify devmem_is_allowed across architectures
This patch unifies devmem_is_allowed() across different architectures.
It removes the devmem_is_allowed 1 defines from m32r and frv and
adds a generic fallback implementation to <asm-generic/page.h>.
Architecutes can define their version and define __HAVE_ARCH_RANGE_IS_ALLOWED.
Signed-off-by: Bernhard Walle <bwalle(a)suse.de>
---
arch/x86/include/asm/page.h | 1 +
include/asm-frv/page.h | 2 --
include/asm-generic/page.h | 4 ++++
include/asm-m32r/page.h | 2 --
4 files changed, 5 insertions(+), 4 deletions(-)
diff --git a/arch/x86/include/asm/page.h b/arch/x86/include/asm/page.h
index e9873a2..b768401 100644
--- a/arch/x86/include/asm/page.h
+++ b/arch/x86/include/asm/page.h
@@ -63,6 +63,7 @@ extern void map_devmem(unsigned long pfn, unsigned long size,
pgprot_t vma_prot);
extern void unmap_devmem(unsigned long pfn, unsigned long size,
pgprot_t vma_prot);
+#define __HAVE_ARCH_RANGE_IS_ALLOWED 1
extern unsigned long max_low_pfn_mapped;
extern unsigned long max_pfn_mapped;
diff --git a/include/asm-frv/page.h b/include/asm-frv/page.h
index bd9c220..bc2c835 100644
--- a/include/asm-frv/page.h
+++ b/include/asm-frv/page.h
@@ -40,8 +40,6 @@ typedef struct page *pgtable_t;
#define __pgprot(x) ((pgprot_t) { (x) } )
#define PTE_MASK PAGE_MASK
-#define devmem_is_allowed(pfn) 1
-
#define __pa(vaddr) virt_to_phys((void *) (unsigned long) (vaddr))
#define __va(paddr) phys_to_virt((unsigned long) (paddr))
diff --git a/include/asm-generic/page.h b/include/asm-generic/page.h
index 14db733..cde4ceb 100644
--- a/include/asm-generic/page.h
+++ b/include/asm-generic/page.h
@@ -19,6 +19,10 @@ static __inline__ __attribute_const__ int get_order(unsigned long
size)
return order;
}
+#ifndef __HAVE_ARCH_RANGE_IS_ALLOWED
+#define devmem_is_allowed(pfn) 1
+#endif
+
#endif /* __ASSEMBLY__ */
#endif /* _ASM_GENERIC_PAGE_H */
diff --git a/include/asm-m32r/page.h b/include/asm-m32r/page.h
index c933308..89d6b10 100644
--- a/include/asm-m32r/page.h
+++ b/include/asm-m32r/page.h
@@ -79,8 +79,6 @@ typedef struct page *pgtable_t;
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC )
-#define devmem_is_allowed(x) 1
-
#include <asm-generic/memory_model.h>
#include <asm-generic/page.h>
--
1.6.0.4