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author | Dan Magenheimer <dan.magenheimer@oracle.com> | 2013-04-30 15:27:00 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-30 17:04:01 -0700 |
commit | 10a7a0771399a57a297fca9615450dbb3f88081a (patch) | |
tree | 7c8564daf7ce2698277a4a38edb9ef0f636cb429 /drivers/xen/xen-selfballoon.c | |
parent | ff610a1d55da22bf95bbc6a8b193e052169b34b7 (diff) | |
download | op-kernel-dev-10a7a0771399a57a297fca9615450dbb3f88081a.zip op-kernel-dev-10a7a0771399a57a297fca9615450dbb3f88081a.tar.gz |
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 <dan.magenheimer@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Andor Daam <andor.daam@googlemail.com>
Cc: Florian Schmaus <fschmaus@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Stefan Hengelein <ilendir@googlemail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/xen/xen-selfballoon.c')
-rw-r--r-- | drivers/xen/xen-selfballoon.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/drivers/xen/xen-selfballoon.c b/drivers/xen/xen-selfballoon.c index 2552d3e..f2ef569 100644 --- a/drivers/xen/xen-selfballoon.c +++ b/drivers/xen/xen-selfballoon.c @@ -121,7 +121,7 @@ static DECLARE_DELAYED_WORK(selfballoon_worker, selfballoon_process); static bool frontswap_selfshrinking __read_mostly; /* Enable/disable with kernel boot option. */ -static bool use_frontswap_selfshrink __initdata = true; +static bool use_frontswap_selfshrink = true; /* * The default values for the following parameters were deemed reasonable @@ -185,7 +185,7 @@ static int __init xen_nofrontswap_selfshrink_setup(char *s) __setup("noselfshrink", xen_nofrontswap_selfshrink_setup); /* Disable with kernel boot option. */ -static bool use_selfballooning __initdata = true; +static bool use_selfballooning = true; static int __init xen_noselfballooning_setup(char *s) { @@ -196,7 +196,7 @@ static int __init xen_noselfballooning_setup(char *s) __setup("noselfballooning", xen_noselfballooning_setup); #else /* !CONFIG_FRONTSWAP */ /* Enable with kernel boot option. */ -static bool use_selfballooning __initdata = false; +static bool use_selfballooning; static int __init xen_selfballooning_setup(char *s) { @@ -537,7 +537,7 @@ int register_xen_selfballooning(struct device *dev) } EXPORT_SYMBOL(register_xen_selfballooning); -static int __init xen_selfballoon_init(void) +int xen_selfballoon_init(bool use_selfballooning, bool use_frontswap_selfshrink) { bool enable = false; @@ -571,7 +571,4 @@ static int __init xen_selfballoon_init(void) return 0; } - -subsys_initcall(xen_selfballoon_init); - -MODULE_LICENSE("GPL"); +EXPORT_SYMBOL(xen_selfballoon_init); |