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tile: query dynamic DEBUG_PAGEALLOC setting

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We can disable debug_pagealloc processing even if the code is compiled
with CONFIG_DEBUG_PAGEALLOC.  This patch changes the code to query
whether it is enabled or not in runtime.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Takashi Iwai <tiwai@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joonsoo Kim 2016-03-17 14:18:02 -07:00 committed by Linus Torvalds
parent e7df0d88c4
commit 21c647865a
1 changed files with 7 additions and 4 deletions
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11
arch/tile/mm/init.c
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@ -896,17 +896,15 @@ void __init pgtable_cache_init(void)
panic("pgtable_cache_init(): Cannot create pgd cache");
}
#ifdef CONFIG_DEBUG_PAGEALLOC
static long __write_once initfree;
#else
static long __write_once initfree = 1;
#endif
static bool __write_once set_initfree_done;
/* Select whether to free (1) or mark unusable (0) the __init pages. */
static int __init set_initfree(char *str)
{
long val;
if (kstrtol(str, 0, &val) == 0) {
set_initfree_done = true;
initfree = val;
pr_info("initfree: %s free init pages\n",
initfree ? "will" : "won't");
@ -919,6 +917,11 @@ static void free_init_pages(char *what, unsigned long begin, unsigned long end)
{
unsigned long addr = (unsigned long) begin;
/* Prefer user request first */
if (!set_initfree_done) {
if (debug_pagealloc_enabled())
initfree = 0;
}
if (kdata_huge && !initfree) {
pr_warn("Warning: ignoring initfree=0: incompatible with kdata=huge\n");
initfree = 1;