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: 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>
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@ -896,17 +896,15 @@ void __init pgtable_cache_init(void)
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panic("pgtable_cache_init(): Cannot create pgd cache");
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}
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#ifdef CONFIG_DEBUG_PAGEALLOC
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static long __write_once initfree;
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#else
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static long __write_once initfree = 1;
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#endif
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static bool __write_once set_initfree_done;
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/* Select whether to free (1) or mark unusable (0) the __init pages. */
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static int __init set_initfree(char *str)
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{
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long val;
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if (kstrtol(str, 0, &val) == 0) {
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set_initfree_done = true;
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initfree = val;
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pr_info("initfree: %s free init pages\n",
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initfree ? "will" : "won't");
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@ -919,6 +917,11 @@ static void free_init_pages(char *what, unsigned long begin, unsigned long end)
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{
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unsigned long addr = (unsigned long) begin;
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/* Prefer user request first */
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if (!set_initfree_done) {
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if (debug_pagealloc_enabled())
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initfree = 0;
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}
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if (kdata_huge && !initfree) {
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pr_warn("Warning: ignoring initfree=0: incompatible with kdata=huge\n");
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initfree = 1;
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