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authorAkinobu Mita <akinobu.mita@gmail.com>2009-03-31 15:23:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-01 08:59:14 -0700
commitf4112de6b679d84bd9b9681c7504be7bdfb7c7d5 (patch)
treec9a5665b31e751e1d4255b8c35a6245d5abfa3eb /include/linux/highmem.h
parent851a039cc547b33b8139fe6d7c2bbfb158e2724e (diff)
downloadop-kernel-dev-f4112de6b679d84bd9b9681c7504be7bdfb7c7d5.zip
op-kernel-dev-f4112de6b679d84bd9b9681c7504be7bdfb7c7d5.tar.gz
mm: introduce debug_kmap_atomic
x86 has debug_kmap_atomic_prot() which is error checking function for kmap_atomic. It is usefull for the other architectures, although it needs CONFIG_TRACE_IRQFLAGS_SUPPORT. This patch exposes it to the other architectures. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/highmem.h')
-rw-r--r--include/linux/highmem.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index 13875ce..7ff5c55 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -187,4 +187,16 @@ static inline void copy_highpage(struct page *to, struct page *from)
kunmap_atomic(vto, KM_USER1);
}
+#if defined(CONFIG_DEBUG_HIGHMEM) && defined(CONFIG_TRACE_IRQFLAGS_SUPPORT)
+
+void debug_kmap_atomic(enum km_type type);
+
+#else
+
+static inline void debug_kmap_atomic(enum km_type type)
+{
+}
+
+#endif
+
#endif /* _LINUX_HIGHMEM_H */
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