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sound: 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.

[[email protected]: export _debug_pagealloc_enabled to modules]
Signed-off-by: Joonsoo Kim <[email protected]>
Acked-by: David Rientjes <[email protected]>
Acked-by: Takashi Iwai <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Christian Borntraeger <[email protected]>
Cc: Christoph Lameter <[email protected]>
Cc: Pekka Enberg <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Joonsoo Kim 2016-03-17 14:17:56 -07:00 • committed by Linus Torvalds
commit 505f6d22db
2 changed files with 6 additions and 4 deletions
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9
sound/drivers/pcsp/pcsp.c
View file

@ -14,6 +14,7 @@
#include <linux/input.h>
#include <linux/delay.h>
#include <linux/bitops.h>
#include <linux/mm.h>
#include "pcsp_input.h"
#include "pcsp.h"
@ -148,11 +149,11 @@ static int alsa_card_pcsp_init(struct device *dev)
return err;
}
#ifdef CONFIG_DEBUG_PAGEALLOC
/* Well, CONFIG_DEBUG_PAGEALLOC makes the sound horrible. Lets alert */
printk(KERN_WARNING "PCSP: CONFIG_DEBUG_PAGEALLOC is enabled, "
"which may make the sound noisy.\n");
#endif
if (debug_pagealloc_enabled()) {
printk(KERN_WARNING "PCSP: CONFIG_DEBUG_PAGEALLOC is enabled, "
"which may make the sound noisy.\n");
}
return 0;
}