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authorSzabolcs Nagy <nsz@port70.net>2013-05-26 15:49:08 +0000
committerSzabolcs Nagy <nsz@port70.net>2013-05-26 15:49:08 +0000
commit41c34d188a598b016d62e152735f8466fe9910a4 (patch)
tree90efa948a7901fbfb9450a33373c17efec3f666c /arch/x86_64
parenta6367a17d5f77848e8313b1e5e42698aec92908d (diff)
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fix ioctl _IOR, _IOW, etc macros to avoid signed overflow (2<<30)
Diffstat (limited to 'arch/x86_64')
-rw-r--r--arch/x86_64/bits/ioctl.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86_64/bits/ioctl.h b/arch/x86_64/bits/ioctl.h
index 7f3c0380..77a94551 100644
--- a/arch/x86_64/bits/ioctl.h
+++ b/arch/x86_64/bits/ioctl.h
@@ -4,9 +4,9 @@
 #define _IOC_READ  2U
 
 #define _IO(a,b) _IOC(_IOC_NONE,(a),(b),0)
-#define _IOW(a,b,c) _IOC(1,(a),(b),sizeof(c))
-#define _IOR(a,b,c) _IOC(2,(a),(b),sizeof(c))
-#define _IOWR(a,b,c) _IOC(3,(a),(b),sizeof(c))
+#define _IOW(a,b,c) _IOC(_IOC_WRITE,(a),(b),sizeof(c))
+#define _IOR(a,b,c) _IOC(_IOC_READ,(a),(b),sizeof(c))
+#define _IOWR(a,b,c) _IOC(_IOC_READ|_IOC_WRITE,(a),(b),sizeof(c))
 
 #define TCGETS		0x5401
 #define TCSETS		0x5402