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staging: zsmalloc: Finish conversion to a separate module

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ZSMALLOC is tristate, but the code has no MODULE_LICENSE and since it
depends on GPL-only symbols it cannot be loaded as a module.  This in
turn breaks zram which now depends on it.  I assume it's meant to be
Dual BSD/GPL like the other z-stuff.

There is also no module_exit, which will make it impossible to unload.
Add the appropriate module_init and module_exit declarations suggested
by comments.

Reported-by: Christian Ohm <chr.ohm@gmx.net>
References: http://bugs.debian.org/677273
Cc: stable@vger.kernel.org # v3.4
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Reviewed-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ben Hutchings 2012-06-20 02:31:11 +01:00 committed by Greg Kroah-Hartman
parent 2f0f8e6a21
commit 069f101fa4
1 changed files with 7 additions and 26 deletions
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33
drivers/staging/zsmalloc/zsmalloc-main.c
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@ -471,12 +471,6 @@ static struct page *find_get_zspage(struct size_class *class)
}
/*
* If this becomes a separate module, register zs_init() with
* module_init(), zs_exit with module_exit(), and remove zs_initialized
*/
static int zs_initialized;
static int zs_cpu_notifier(struct notifier_block *nb, unsigned long action,
void *pcpu)
{
@ -535,7 +529,7 @@ static int zs_init(void)
struct zs_pool *zs_create_pool(const char *name, gfp_t flags)
{
int i, error, ovhd_size;
int i, ovhd_size;
struct zs_pool *pool;
if (!name)
@ -562,28 +556,9 @@ struct zs_pool *zs_create_pool(const char *name, gfp_t flags)
}
/*
* If this becomes a separate module, register zs_init with
* module_init, and remove this block
*/
if (!zs_initialized) {
error = zs_init();
if (error)
goto cleanup;
zs_initialized = 1;
}
pool->flags = flags;
pool->name = name;
error = 0; /* Success */
cleanup:
if (error) {
zs_destroy_pool(pool);
pool = NULL;
}
return pool;
}
EXPORT_SYMBOL_GPL(zs_create_pool);
@ -799,3 +774,9 @@ u64 zs_get_total_size_bytes(struct zs_pool *pool)
return npages << PAGE_SHIFT;
}
EXPORT_SYMBOL_GPL(zs_get_total_size_bytes);
module_init(zs_init);
module_exit(zs_exit);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Nitin Gupta <ngupta@vflare.org>");