From 10a7a0771399a57a297fca9615450dbb3f88081a Mon Sep 17 00:00:00 2001 From: Dan Magenheimer Date: Tue, 30 Apr 2013 15:27:00 -0700 Subject: xen: tmem: enable Xen tmem shim to be built/loaded as a module Allow Xen tmem shim to be built/loaded as a module. Xen self-ballooning and frontswap-selfshrinking are now also "lazily" initialized when the Xen tmem shim is loaded as a module, unless explicitly disabled by module parameters. Note runtime dependency disallows loading if cleancache/frontswap lazy initialization patches are not present. If built-in (not built as a module), the original mechanism of enabling via a kernel boot parameter is retained, but this should be considered deprecated. Note that module unload is explicitly not yet supported. [v1: Removed the [CLEANCACHE|FRONTSWAP]_HAS_LAZY_INIT ifdef] [v2: Squashed the xen/tmem: Remove the subsys call patch in] [akpm@linux-foundation.org: fix build (disable_frontswap_selfshrinking undeclared)] Signed-off-by: Dan Magenheimer Signed-off-by: Konrad Rzeszutek Wilk Signed-off-by: Bob Liu Cc: Wanpeng Li Cc: Andor Daam Cc: Florian Schmaus Cc: Minchan Kim Cc: Stefan Hengelein Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/xen/tmem.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include') diff --git a/include/xen/tmem.h b/include/xen/tmem.h index 591550a22ac7..3930a90045ff 100644 --- a/include/xen/tmem.h +++ b/include/xen/tmem.h @@ -3,7 +3,15 @@ #include +#ifdef CONFIG_XEN_TMEM_MODULE +#define tmem_enabled true +#else /* defined in drivers/xen/tmem.c */ extern bool tmem_enabled; +#endif + +#ifdef CONFIG_XEN_SELFBALLOONING +extern int xen_selfballoon_init(bool, bool); +#endif #endif /* _XEN_TMEM_H */ -- cgit v1.2.3