[PATCH 1/2] mm: export unmap_kernel_range

[PATCH 1/2] mm: export unmap_kernel_range

[Minchan Kim]

Now zsmalloc needs exported unmap_kernel_range for building it
as module. In detail, here it is. https://lkml.org/lkml/2013/1/18/487

I didn't send a patch to make unmap_kernel_range exportable at that time
because zram was staging stuff and I thought VM function exporting
for staging stuff makes no sense.

Now zsmalloc was promoted. If we can't build zsmalloc as module,
it means we can't build zram as module, either.
Additionally, buddy map_vm_area is already exported so let's export
unmap_kernel_range to help his buddy.

Signed-off-by: Minchan Kim <minchan@kernel.org>
---
 mm/vmalloc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 2ed75fb89fc1..f64632b67196 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -1268,6 +1268,7 @@ void unmap_kernel_range(unsigned long addr, unsigned long size)
 	vunmap_page_range(addr, end);
 	flush_tlb_kernel_range(addr, end);
 }
+EXPORT_SYMBOL_GPL(unmap_kernel_range);
 
 int map_vm_area(struct vm_struct *area, pgprot_t prot, struct page ***pages)
 {
-- 
1.9.2

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[PATCH 2/2] zsmalloc: make zsmalloc module-buildable

[Minchan Kim]

Now, we can build zsmalloc as module because unmap_kernel_range
was exported.

Signed-off-by: Minchan Kim <minchan@kernel.org>
---
 mm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/Kconfig b/mm/Kconfig
index 30cb6cb008f5..709a77a0fb55 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -558,7 +558,7 @@ config MEM_SOFT_DIRTY
 	  See Documentation/vm/soft-dirty.txt for more details.
 
 config ZSMALLOC
-	bool "Memory allocator for compressed pages"
+	tristate "Memory allocator for compressed pages"
 	depends on MMU
 	default n
 	help
-- 
1.9.2

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