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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/include/linux/kdev_t.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/include/linux/kdev_t.h')
-rw-r--r--kernel/include/linux/kdev_t.h92
1 files changed, 92 insertions, 0 deletions
diff --git a/kernel/include/linux/kdev_t.h b/kernel/include/linux/kdev_t.h
new file mode 100644
index 000000000..c838abe3e
--- /dev/null
+++ b/kernel/include/linux/kdev_t.h
@@ -0,0 +1,92 @@
+#ifndef _LINUX_KDEV_T_H
+#define _LINUX_KDEV_T_H
+
+#include <uapi/linux/kdev_t.h>
+
+#define MINORBITS 20
+#define MINORMASK ((1U << MINORBITS) - 1)
+
+#define MAJOR(dev) ((unsigned int) ((dev) >> MINORBITS))
+#define MINOR(dev) ((unsigned int) ((dev) & MINORMASK))
+#define MKDEV(ma,mi) (((ma) << MINORBITS) | (mi))
+
+#define print_dev_t(buffer, dev) \
+ sprintf((buffer), "%u:%u\n", MAJOR(dev), MINOR(dev))
+
+#define format_dev_t(buffer, dev) \
+ ({ \
+ sprintf(buffer, "%u:%u", MAJOR(dev), MINOR(dev)); \
+ buffer; \
+ })
+
+/* acceptable for old filesystems */
+static inline int old_valid_dev(dev_t dev)
+{
+ return MAJOR(dev) < 256 && MINOR(dev) < 256;
+}
+
+static inline u16 old_encode_dev(dev_t dev)
+{
+ return (MAJOR(dev) << 8) | MINOR(dev);
+}
+
+static inline dev_t old_decode_dev(u16 val)
+{
+ return MKDEV((val >> 8) & 255, val & 255);
+}
+
+static inline int new_valid_dev(dev_t dev)
+{
+ return 1;
+}
+
+static inline u32 new_encode_dev(dev_t dev)
+{
+ unsigned major = MAJOR(dev);
+ unsigned minor = MINOR(dev);
+ return (minor & 0xff) | (major << 8) | ((minor & ~0xff) << 12);
+}
+
+static inline dev_t new_decode_dev(u32 dev)
+{
+ unsigned major = (dev & 0xfff00) >> 8;
+ unsigned minor = (dev & 0xff) | ((dev >> 12) & 0xfff00);
+ return MKDEV(major, minor);
+}
+
+static inline int huge_valid_dev(dev_t dev)
+{
+ return 1;
+}
+
+static inline u64 huge_encode_dev(dev_t dev)
+{
+ return new_encode_dev(dev);
+}
+
+static inline dev_t huge_decode_dev(u64 dev)
+{
+ return new_decode_dev(dev);
+}
+
+static inline int sysv_valid_dev(dev_t dev)
+{
+ return MAJOR(dev) < (1<<14) && MINOR(dev) < (1<<18);
+}
+
+static inline u32 sysv_encode_dev(dev_t dev)
+{
+ return MINOR(dev) | (MAJOR(dev) << 18);
+}
+
+static inline unsigned sysv_major(u32 dev)
+{
+ return (dev >> 18) & 0x3fff;
+}
+
+static inline unsigned sysv_minor(u32 dev)
+{
+ return dev & 0x3ffff;
+}
+
+#endif