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xen/balloon: fix unused-variable warning

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In configurations with CONFIG_XEN_BALLOON_MEMORY_HOTPLUG=n
and CONFIG_XEN_BALLOON_MEMORY_HOTPLUG=y, gcc warns about an
unused variable:

drivers/xen/balloon.c:83:12: error: 'xen_hotplug_unpopulated' defined but not used [-Werror=unused-variable]

Since this is always zero when CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
is disabled, turn it into a preprocessor constant in that case.

Fixes: 121f2faca2c0 ("xen/balloon: rename alloc/free_xenballooned_pages")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20211108111408.3940366-1-arnd@kernel.org
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
This commit is contained in:
Arnd Bergmann 2021-11-08 12:14:02 +01:00 committed by Boris Ostrovsky
parent 121f2faca2
commit 501586ea59
1 changed files with 3 additions and 2 deletions
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5
drivers/xen/balloon.c
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@ -80,9 +80,8 @@
static uint __read_mostly balloon_boot_timeout = 180;
module_param(balloon_boot_timeout, uint, 0444);
static int xen_hotplug_unpopulated;
#ifdef CONFIG_XEN_BALLOON_MEMORY_HOTPLUG
static int xen_hotplug_unpopulated;
static struct ctl_table balloon_table[] = {
{
@ -115,6 +114,8 @@ static struct ctl_table xen_root[] = {
{ }
};
#else
#define xen_hotplug_unpopulated 0
#endif
/*