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authorHeiko Carstens <heiko.carstens@de.ibm.com>2006-09-20 15:58:51 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2006-09-20 15:58:51 +0200
commit39b083fe1c3c7b88939f6fa1b0b96e579f12e96f (patch)
treeb56864fed4a0aa286696cb4e63cbea6d8a962c8a /include/asm-s390/io.h
parentff6b8ea68f4b7353f88b97024f28127e2148aa00 (diff)
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[S390] empty function defines.
Use do { } while (0) constructs instead of empty defines to avoid subtle compile bugs. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'include/asm-s390/io.h')
-rw-r--r--include/asm-s390/io.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/asm-s390/io.h b/include/asm-s390/io.h
index d4614b3..a6cc27e 100644
--- a/include/asm-s390/io.h
+++ b/include/asm-s390/io.h
@@ -116,7 +116,7 @@ extern void iounmap(void *addr);
#define outb(x,addr) ((void) writeb(x,addr))
#define outb_p(x,addr) outb(x,addr)
-#define mmiowb()
+#define mmiowb() do { } while (0)
/*
* Convert a physical pointer to a virtual kernel pointer for /dev/mem
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