From: Christian Borntraeger <borntraeger@de.ibm.com>
To: linux-kernel@vger.kernel.org
Cc: akpm@linux-foundation.org, linux-mm@kvack.org,
linux-arch@vger.kernel.org, linux-s390@vger.kernel.org,
x86@kernel.org, linuxppc-dev@lists.ozlabs.org,
davem@davemloft.net, Joonsoo Kim <iamjoonsoo.kim@lge.com>,
davej@codemonkey.org.uk,
Christian Borntraeger <borntraeger@de.ibm.com>
Subject: [PATCH v2 1/3] mm: provide debug_pagealloc_enabled() without CONFIG_DEBUG_PAGEALLOC
Date: Wed, 27 Jan 2016 09:50:16 +0100 [thread overview]
Message-ID: <1453884618-33852-2-git-send-email-borntraeger@de.ibm.com> (raw)
In-Reply-To: <1453884618-33852-1-git-send-email-borntraeger@de.ibm.com>
We can provide debug_pagealloc_enabled() also if CONFIG_DEBUG_PAGEALLOC
is not set. It will return false in that case.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: David Rientjes <rientjes@google.com>
---
include/linux/mm.h | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7783073..56cab4e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2147,13 +2147,18 @@ kernel_map_pages(struct page *page, int numpages, int enable)
#ifdef CONFIG_HIBERNATION
extern bool kernel_page_present(struct page *page);
#endif /* CONFIG_HIBERNATION */
-#else
+#else /* CONFIG_DEBUG_PAGEALLOC */
+static inline bool debug_pagealloc_enabled(void)
+{
+ return false;
+}
+
static inline void
kernel_map_pages(struct page *page, int numpages, int enable) {}
#ifdef CONFIG_HIBERNATION
static inline bool kernel_page_present(struct page *page) { return true; }
#endif /* CONFIG_HIBERNATION */
-#endif
+#endif /* CONFIG_DEBUG_PAGEALLOC */
#ifdef __HAVE_ARCH_GATE_AREA
extern struct vm_area_struct *get_gate_vma(struct mm_struct *mm);
--
2.3.0
next prev parent reply other threads:[~2016-01-27 8:50 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-27 8:50 [PATCH v2 0/3] Optimize CONFIG_DEBUG_PAGEALLOC Christian Borntraeger
2016-01-27 8:50 ` Christian Borntraeger [this message]
2016-01-27 9:15 ` [PATCH v2 1/3] mm: provide debug_pagealloc_enabled() without CONFIG_DEBUG_PAGEALLOC Thomas Gleixner
2016-01-27 8:50 ` [PATCH v2 2/3] x86: query dynamic DEBUG_PAGEALLOC setting Christian Borntraeger
2016-01-27 9:16 ` Thomas Gleixner
2016-01-27 8:50 ` [PATCH v2 3/3] s390: " Christian Borntraeger
2016-01-27 9:55 ` Heiko Carstens
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