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mm: fix unused variable kernel warning when SYSCTL=n 

When CONFIG_SYSCTL=n the variable dirty_bytes_min which is just used
as a minimum to a proc handler is not used. So just move this under
the ifdef for CONFIG_SYSCTL.

Fixes: aa779e5102 ("mm: move page-writeback sysctls to their own file")
Reported-by: kernel test robot <lkp@intel.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
This commit is contained in:
Luis Chamberlain 2022-04-15 15:08:02 -07:00
parent 988f11e046
commit 3c6a4cba31
1 changed files with 4 additions and 3 deletions
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7
mm/page-writeback.c
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@ -89,9 +89,6 @@ static int vm_highmem_is_dirtyable;
*/
static int vm_dirty_ratio = 20;
/* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
static const unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
/*
* vm_dirty_bytes starts at 0 (disabled) so that it is a function of
* vm_dirty_ratio * the amount of dirtyable memory
@ -2077,6 +2074,10 @@ static int page_writeback_cpu_online(unsigned int cpu)
}
#ifdef CONFIG_SYSCTL
/* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
static const unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
static struct ctl_table vm_page_writeback_sysctls[] = {
{
.procname = "dirty_background_ratio",