patch-2.4.0-test4 linux/drivers/char/ftape/zftape/zftape-init.c

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Lines: 268
Date: Wed Jul 12 21:58:42 2000
Orig file: v2.4.0-test3/linux/drivers/char/ftape/zftape/zftape-init.c
Orig date: Mon Jul 10 16:47:22 2000

diff -u --recursive --new-file v2.4.0-test3/linux/drivers/char/ftape/zftape/zftape-init.c linux/drivers/char/ftape/zftape/zftape-init.c
@@ -35,15 +35,11 @@
 #endif
 #include <linux/fcntl.h>
 #include <linux/wrapper.h>
+#include <linux/smp_lock.h>
 #include <linux/devfs_fs_kernel.h>
 
 #include <linux/zftape.h>
-#if LINUX_VERSION_CODE >=KERNEL_VER(2,1,16)
 #include <linux/init.h>
-#else
-#define __initdata
-#define __initfunc(__arg) __arg
-#endif
 
 #include "../zftape/zftape-init.h"
 #include "../zftape/zftape-read.h"
@@ -56,7 +52,6 @@
 char zft_rev[] __initdata = "$Revision: 1.8 $";
 char zft_dat[] __initdata = "$Date: 1997/11/06 00:48:56 $";
 
-#if LINUX_VERSION_CODE >= KERNEL_VER(2,1,18)
 MODULE_AUTHOR("(c) 1996, 1997 Claus-Justus Heine "
 	      "(claus@momo.math.rwth-aachen.de)");
 MODULE_DESCRIPTION(ZFTAPE_VERSION " - "
@@ -64,7 +59,6 @@
 		   "Support for QIC-113 compatible volume table "
 		   "and builtin compression (lzrw3 algorithm)");
 MODULE_SUPPORTED_DEVICE("char-major-27");
-#endif
 
 /*      Global vars.
  */
@@ -90,38 +84,18 @@
  */
 
 static int  zft_open (struct inode *ino, struct file *filep);
-#if LINUX_VERSION_CODE >= KERNEL_VER(2,1,31)
 static int zft_close(struct inode *ino, struct file *filep);
-#else
-static void zft_close(struct inode *ino, struct file *filep);
-#endif
 static int  zft_ioctl(struct inode *ino, struct file *filep,
 		      unsigned int command, unsigned long arg);
-#if LINUX_VERSION_CODE >= KERNEL_VER(2,1,56)
 static int  zft_mmap(struct file *filep, struct vm_area_struct *vma);
-#else
-static int  zft_mmap(struct inode *ino, struct file *filep,
-		     struct vm_area_struct *vma);
-#endif
-#if LINUX_VERSION_CODE >= KERNEL_VER(2,1,60)
 static ssize_t zft_read (struct file *fp, char *buff,
 			 size_t req_len, loff_t *ppos);
 static ssize_t zft_write(struct file *fp, const char *buff,
 			 size_t req_len, loff_t *ppos);
-#elif LINUX_VERSION_CODE >= KERNEL_VER(2,1,0)
-static long zft_read (struct inode *ino, struct file *fp, char *buff,
-		      unsigned long req_len);
-static long zft_write(struct inode *ino, struct file *fp, const char *buff,
-		      unsigned long req_len);
-#else
-static int  zft_read (struct inode *ino, struct file *fp, char *buff,
-		      int req_len); 
-static int  zft_write(struct inode *ino, struct file *fp, const char *buff,
-		      int req_len);
-#endif
 
 static struct file_operations zft_cdev =
 {
+	owner:		THIS_MODULE,
 	read:		zft_read,
 	write:		zft_write,
 	ioctl:		zft_ioctl,
@@ -137,15 +111,6 @@
 	int result;
 	TRACE_FUN(ft_t_flow);
 
-#if LINUX_VERSION_CODE < KERNEL_VER(2,1,18)
-	if (!MOD_IN_USE) {
-		MOD_INC_USE_COUNT; /* lock module in memory */
-	}
-#else
-	MOD_INC_USE_COUNT; /*  sets MOD_VISITED and MOD_USED_ONCE,
-			    *  locking is done with can_unload()
-			    */
-#endif
 	TRACE(ft_t_flow, "called for minor %d", MINOR(ino->i_rdev));
 	if (busy_flag) {
 		TRACE_ABORT(-EBUSY, ft_t_warn, "failed: already busy");
@@ -155,11 +120,6 @@
 	     > 
 	    FTAPE_SEL_D) {
 		busy_flag = 0;
-#if defined(MODULE) && LINUX_VERSION_CODE < KERNEL_VER(2,1,18)
-		if (!zft_dirty()) {
-			MOD_DEC_USE_COUNT; /* unlock module in memory */
-		}
-#endif
 		TRACE_ABORT(-ENXIO, ft_t_err, "failed: illegal unit nr");
 	}
 	orig_sigmask = current->blocked;
@@ -168,11 +128,6 @@
 	if (result < 0) {
 		current->blocked = orig_sigmask; /* restore mask */
 		busy_flag = 0;
-#if defined(MODULE) && LINUX_VERSION_CODE < KERNEL_VER(2,1,18)
-		if (!zft_dirty()) {
-			MOD_DEC_USE_COUNT; /* unlock module in memory */
-		}
-#endif
 		TRACE_ABORT(result, ft_t_err, "_ftape_open failed");
 	} else {
 		/* Mask signals that will disturb proper operation of the
@@ -191,13 +146,11 @@
 	int result;
 	TRACE_FUN(ft_t_flow);
 
+	lock_kernel();
 	if (!busy_flag || MINOR(ino->i_rdev) != zft_unit) {
 		TRACE(ft_t_err, "failed: not busy or wrong unit");
-#if LINUX_VERSION_CODE >= KERNEL_VER(2,1,31)
+		unlock_kernel();
 		TRACE_EXIT 0;
-#else
-		TRACE_EXIT; /* keep busy_flag !(?) */
-#endif
 	}
 	sigfillset(&current->blocked);
 	result = _zft_close();
@@ -206,16 +159,8 @@
 	}
 	current->blocked = orig_sigmask; /* restore before open state */
 	busy_flag = 0;
-#if defined(MODULE) && LINUX_VERSION_CODE < KERNEL_VER(2,1,18)
-	if (!zft_dirty()) {
-		MOD_DEC_USE_COUNT; /* unlock module in memory */
-	}
-#endif
-#if LINUX_VERSION_CODE >= KERNEL_VER(2,1,31)
+	unlock_kernel();
 	TRACE_EXIT 0;
-#else
-	TRACE_EXIT;
-#endif
 }
 
 /*      Ioctl for floppy tape device
@@ -241,24 +186,14 @@
 
 /*      Ioctl for floppy tape device
  */
-#if LINUX_VERSION_CODE >= KERNEL_VER(2,1,56)
 static int  zft_mmap(struct file *filep, struct vm_area_struct *vma)
-#else
-static int zft_mmap(struct inode *ino,
-		    struct file *filep,
-		    struct vm_area_struct *vma)
-#endif
 {
 	int result = -EIO;
 	sigset_t old_sigmask;
 	TRACE_FUN(ft_t_flow);
 
 	if (!busy_flag || 
-#if LINUX_VERSION_CODE >= KERNEL_VER(2,1,56)
 	    MINOR(filep->f_dentry->d_inode->i_rdev) != zft_unit || 
-#else
-	    MINOR(ino->i_rdev) != zft_unit ||
-#endif
 	    ft_failure)
 	{
 		TRACE_ABORT(-EIO, ft_t_err,
@@ -266,34 +201,26 @@
 	}
 	old_sigmask = current->blocked; /* save mask */
 	sigfillset(&current->blocked);
+	lock_kernel();
 	if ((result = ftape_mmap(vma)) >= 0) {
 #ifndef MSYNC_BUG_WAS_FIXED
 		static struct vm_operations_struct dummy = { NULL, };
 		vma->vm_ops = &dummy;
 #endif
 	}
+	unlock_kernel();
 	current->blocked = old_sigmask; /* restore mask */
 	TRACE_EXIT result;
 }
 
 /*      Read from floppy tape device
  */
-#if LINUX_VERSION_CODE >= KERNEL_VER(2,1,60)
 static ssize_t zft_read(struct file *fp, char *buff,
 			size_t req_len, loff_t *ppos)
-#elif LINUX_VERSION_CODE >= KERNEL_VER(2,1,0)
-static long zft_read(struct inode *ino, struct file *fp, char *buff,
-		     unsigned long req_len)
-#else
-static int  zft_read(struct inode *ino, struct file *fp, char *buff,
-		     int req_len)
-#endif
 {
 	int result = -EIO;
 	sigset_t old_sigmask;
-#if LINUX_VERSION_CODE >= KERNEL_VER(2,1,60)
 	struct inode *ino = fp->f_dentry->d_inode;
-#endif
 	TRACE_FUN(ft_t_flow);
 
 	TRACE(ft_t_data_flow, "called with count: %ld", (unsigned long)req_len);
@@ -311,22 +238,12 @@
 
 /*      Write to tape device
  */
-#if LINUX_VERSION_CODE >= KERNEL_VER(2,1,60)
 static ssize_t zft_write(struct file *fp, const char *buff,
 			 size_t req_len, loff_t *ppos)
-#elif LINUX_VERSION_CODE >= KERNEL_VER(2,1,0)
-static long zft_write(struct inode *ino, struct file *fp, const char *buff,
-		      unsigned long req_len)
-#else
-static int  zft_write(struct inode *ino, struct file *fp, const char *buff,
-		      int req_len)
-#endif
 {
 	int result = -EIO;
 	sigset_t old_sigmask;
-#if LINUX_VERSION_CODE >= KERNEL_VER(2,1,60)
 	struct inode *ino = fp->f_dentry->d_inode;
-#endif
 	TRACE_FUN(ft_t_flow);
 
 	TRACE(ft_t_flow, "called with count: %ld", (unsigned long)req_len);
@@ -470,9 +387,6 @@
 				&zft_cdev, NULL);
 	}
 
-#if LINUX_VERSION_CODE < KERNEL_VER(2,1,18)
-	register_symtab(&zft_symbol_table); /* add global zftape symbols */
-#endif
 #ifdef CONFIG_ZFT_COMPRESSOR
 	(void)zft_compressor_init();
 #endif
@@ -484,24 +398,20 @@
 
 
 #ifdef MODULE
-#if LINUX_VERSION_CODE >= KERNEL_VER(2,1,18)
 /* Called by modules package before trying to unload the module
  */
 static int can_unload(void)
 {
-	return (zft_dirty() || busy_flag) ? -EBUSY : 0;
+	return (GET_USE_COUNT(THIS_MODULE)||zft_dirty()||busy_flag)?-EBUSY:0;
 }
-#endif
 /* Called by modules package when installing the driver
  */
 int init_module(void)
 {
-#if LINUX_VERSION_CODE >= KERNEL_VER(2,1,18)
 	if (!mod_member_present(&__this_module, can_unload)) {
 		return -EBUSY;
 	}
 	__this_module.can_unload = can_unload;
-#endif
 	return zft_init();
 }
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