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Commit 21c64786 authored by Joonsoo Kim's avatar Joonsoo Kim Committed by Linus Torvalds
Browse files

tile: query dynamic DEBUG_PAGEALLOC setting 



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: default avatarJoonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: default avatarChris 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: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e7df0d88

arch/tile/mm/init.c

+7 −4
Original line number Diff line number Diff line
@@ -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;