From: Andries.Brouwer@cwi.nl

The patch below adds a new system call mknod64 for i386.  If there are no
objections I'll add it to the other architectures as well.

Note that the prototype is

mknod64(const char *name, int mode, unsigned int devhi, unsigned int devlo)

(and not ...  unsigned int major, unsigned int minor).




 25-akpm/arch/i386/kernel/entry.S  |    2 +-
 25-akpm/fs/namei.c                |   28 +++++++++++++++++++++++++---
 25-akpm/include/asm-i386/unistd.h |    2 +-
 3 files changed, 27 insertions(+), 5 deletions(-)

diff -puN arch/i386/kernel/entry.S~ia32-mknod64 arch/i386/kernel/entry.S
--- 25/arch/i386/kernel/entry.S~ia32-mknod64	Tue Jun  3 11:03:47 2003
+++ 25-akpm/arch/i386/kernel/entry.S	Tue Jun  3 11:04:07 2003
@@ -900,7 +900,7 @@ ENTRY(sys_call_table)
  	.long sys_clock_gettime		/* 265 */
  	.long sys_clock_getres
  	.long sys_clock_nanosleep
-	.long sys_ni_syscall		/* mknod64 */
+	.long sys_mknod64
 	.long sys_statfs64
 	.long sys_fstatfs64		/* 270 */
  
diff -puN fs/namei.c~ia32-mknod64 fs/namei.c
--- 25/fs/namei.c~ia32-mknod64	Tue Jun  3 11:03:47 2003
+++ 25-akpm/fs/namei.c	Tue Jun  3 11:03:47 2003
@@ -1403,11 +1403,12 @@ int vfs_mknod(struct inode *dir, struct 
 	return error;
 }
 
-asmlinkage long sys_mknod(const char __user * filename, int mode, dev_t dev)
+static long
+do_mknod(const char __user *filename, int mode, dev_t dev)
 {
 	int error = 0;
-	char * tmp;
-	struct dentry * dentry;
+	char *tmp;
+	struct dentry *dentry;
 	struct nameidata nd;
 
 	if (S_ISDIR(mode))
@@ -1448,6 +1449,27 @@ out:
 	return error;
 }
 
+asmlinkage long
+sys_mknod(const char __user *filename, int mode, unsigned int devnr)
+{
+	dev_t dev = devnr;
+
+	if (dev != devnr)
+		return -EOVERFLOW;
+	return do_mknod(filename, mode, dev);
+}
+
+asmlinkage long
+sys_mknod64(const char __user *filename, int mode,
+	    unsigned int major, unsigned int minor)
+{
+	dev_t dev = MKDEV(major, minor);
+
+	if (MAJOR(dev) != major || MINOR(dev) != minor)
+		return -EOVERFLOW;
+	return do_mknod(filename, mode, dev);
+}
+
 int vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 {
 	int error = may_create(dir, dentry);
diff -puN include/asm-i386/unistd.h~ia32-mknod64 include/asm-i386/unistd.h
--- 25/include/asm-i386/unistd.h~ia32-mknod64	Tue Jun  3 11:03:47 2003
+++ 25-akpm/include/asm-i386/unistd.h	Tue Jun  3 11:04:18 2003
@@ -273,7 +273,7 @@
 #define __NR_clock_gettime	(__NR_timer_create+6)
 #define __NR_clock_getres	(__NR_timer_create+7)
 #define __NR_clock_nanosleep	(__NR_timer_create+8)
-#define	__NR_for_mknod64	268
+#define	__NR_mknod64		268
 #define __NR_statfs64		269
 #define __NR_fstatfs64		270
 

_