powerpc/mm: add radix__create_section_mapping()

rarbab · mpe · commit 6cc27341b21a · 2017-01-31T13:54:19.000+11:00
Wire up memory hotplug page mapping for radix. Share the mapping
function already used by radix_init_pgtable().

Signed-off-by: Reza Arbab &lt;arbab@linux.vnet.ibm.com&gt;
Acked-by: Balbir Singh &lt;bsingharora@gmail.com&gt;
Signed-off-by: Michael Ellerman &lt;mpe@ellerman.id.au&gt;
diff --git a/arch/powerpc/include/asm/book3s/64/radix.h b/arch/powerpc/include/asm/book3s/64/radix.h
@@ -291,5 +291,9 @@ static inline unsigned long radix__get_tree_size(void)
 	}
 	return rts_field;
 }
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+int radix__create_section_mapping(unsigned long start, unsigned long end);
+#endif /* CONFIG_MEMORY_HOTPLUG */
 #endif /* __ASSEMBLY__ */
 #endif
diff --git a/arch/powerpc/mm/pgtable-book3s64.c b/arch/powerpc/mm/pgtable-book3s64.c
@@ -131,7 +131,7 @@ void mmu_cleanup_all(void)
 int create_section_mapping(unsigned long start, unsigned long end)
 {
 	if (radix_enabled())
-		return -ENODEV;
+		return radix__create_section_mapping(start, end);
 
 	return hash__create_section_mapping(start, end);
 }
diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c
@@ -481,6 +481,13 @@ void radix__setup_initial_memory_limit(phys_addr_t first_memblock_base,
 	memblock_set_current_limit(first_memblock_base + first_memblock_size);
 }
 
+#ifdef CONFIG_MEMORY_HOTPLUG
+int __ref radix__create_section_mapping(unsigned long start, unsigned long end)
+{
+	return create_physical_mapping(start, end);
+}
+#endif /* CONFIG_MEMORY_HOTPLUG */
+
 #ifdef CONFIG_SPARSEMEM_VMEMMAP
 int __meminit radix__vmemmap_create_mapping(unsigned long start,
 				      unsigned long page_size,

Original file line number	Diff line number	Diff line change
`@@ -291,5 +291,9 @@ static inline unsigned long radix__get_tree_size(void)`
`291`	`291`	`}`
`292`	`292`	`return rts_field;`
`293`	`293`	`}`
	`294`	`+`
	`295`	`+#ifdef CONFIG_MEMORY_HOTPLUG`
	`296`	`+int radix__create_section_mapping(unsigned long start, unsigned long end);`
	`297`	`+#endif /* CONFIG_MEMORY_HOTPLUG */`
`294`	`298`	`#endif /* __ASSEMBLY__ */`
`295`	`299`	`#endif`
Original file line number	Diff line number	Diff line change
`@@ -131,7 +131,7 @@ void mmu_cleanup_all(void)`
`131`	`131`	`int create_section_mapping(unsigned long start, unsigned long end)`
`132`	`132`	`{`
`133`	`133`	`if (radix_enabled())`
`134`		`- return -ENODEV;`
	`134`	`+ return radix__create_section_mapping(start, end);`
`135`	`135`
`136`	`136`	`return hash__create_section_mapping(start, end);`
`137`	`137`	`}`