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Commit 53ed7a59 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Michael Ellerman
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powerpc/mm: Drop the unnecessary region check 



All the regions are now mapped with top nibble 0xc. Hence the region id
check is not needed for virt_addr_valid()

Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent e0909392

arch/powerpc/include/asm/page.h

+0 −12
Original line number Diff line number Diff line
@@ -132,19 +132,7 @@ static inline bool pfn_valid(unsigned long pfn) 
#define virt_to_page(kaddr)	pfn_to_page(virt_to_pfn(kaddr))

#define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)



#ifdef CONFIG_PPC_BOOK3S_64

/*

 * On hash the vmalloc and other regions alias to the kernel region when passed

 * through __pa(), which virt_to_pfn() uses. That means virt_addr_valid() can

 * return true for some vmalloc addresses, which is incorrect. So explicitly

 * check that the address is in the kernel region.

 */

/* may be can drop get_region_id */

#define virt_addr_valid(kaddr) (get_region_id((unsigned long)kaddr) == KERNEL_REGION_ID && \

				pfn_valid(virt_to_pfn(kaddr)))

#else

#define virt_addr_valid(kaddr)	pfn_valid(virt_to_pfn(kaddr))

#endif



/*

 * On Book-E parts we need __va to parse the device tree and we can't