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staging/zsmalloc: don't use pgtable-mapping from modules 

Building zsmalloc as a module does not work on ARM because it uses
an interface that is not exported:

ERROR: "flush_tlb_kernel_range" [drivers/staging/zsmalloc/zsmalloc.ko] undefined!

Since this is only used as a performance optimization and only on ARM,
we can avoid the problem simply by not using that optimization when
building zsmalloc it is a loadable module.

flush_tlb_kernel_range is often an inline function, but out of the
architectures that use an extern function, only powerpc exports
it.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Seth Jennings <sjenning@linux.vnet.ibm.com>
Cc: Nitin Gupta <ngupta@vflare.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Arnd Bergmann 2013-04-23 18:30:48 +02:00 committed by Greg Kroah-Hartman
parent 2516ffac94
commit 796ce5a7e4
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/zsmalloc/zsmalloc-main.c
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@ -225,7 +225,7 @@ struct zs_pool {
* so that USE_PGTABLE_MAPPING is defined. This causes zsmalloc to use
* page table mapping rather than copying for object mapping.
*/
#if defined(CONFIG_ARM)
#if defined(CONFIG_ARM) && !defined(MODULE)
#define USE_PGTABLE_MAPPING
#endif