[PATCH] Win32 equivalent to GetTickCount systemcall (i386)

[David Engraf]

This patch adds a new systemcall on i386 architectures returning the jiffies
value to the application. 
As a kernel developer you can use jiffies but from the user space there is
no equivalent function which counts every millisecond like the Win32
GetTickCount.

linux-2.6.15-rc5-mm1



diff -puN include/asm-i386/unistd_orig.h include/asm-i386/unistd.h
--- include/asm-i386/unistd_orig.h	2005-12-06 12:07:16.000000000 +0100
+++ include/asm-i386/unistd.h	2005-12-06 12:10:07.000000000 +0100
@@ -300,8 +300,9 @@
 #define __NR_inotify_add_watch	292
 #define __NR_inotify_rm_watch	293
 #define __NR_migrate_pages	294
+#define __NR_tickcount	295
 
-#define NR_syscalls 295
+#define NR_syscalls 296
 
 /*
  * user-visible error numbers are in the range -1 - -128: see




diff -puN arch/i386/kernel/syscall_table_orig.S
arch/i386/kernel/syscall_table.S
--- arch/i386/kernel/syscall_table_orig.S	2005-12-06
12:07:14.000000000 +0100
+++ arch/i386/kernel/syscall_table.S	2005-12-06 12:10:40.000000000 +0100
@@ -294,3 +294,4 @@ ENTRY(sys_call_table)
 	.long sys_inotify_add_watch
 	.long sys_inotify_rm_watch
 	.long sys_migrate_pages
+	.long sys_tickcount



diff -puN kernel/sys_orig.c kernel/sys.c
--- kernel/sys_orig.c	2005-12-06 12:06:49.000000000 +0100
+++ kernel/sys.c	2005-12-06 12:08:57.000000000 +0100
@@ -1855,3 +1855,9 @@ asmlinkage long sys_prctl(int option, un
 	}
 	return error;
 }
+
+asmlinkage long sys_tickcount(long __user *ret)
+{
+	if (copy_to_user(ret, (void*)&jiffies, sizeof(long)))
+	return 0;
+}



Thanks
David Engraf


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