Branch:b1_6

fix a bug in dev_read_only-2.6-suse.patch(brought by 11971), which make
dev read_only can not work.
b=13085
i=green
i=shadow

lustre/kernel_patches/patches/dev_read_only-2.6-suse.patch

-diff -rup linux-2.6.5-7.283.orig/drivers/block/ll_rw_blk.c linux-2.6.5-7.283/drivers/block/ll_rw_blk.c
---- linux-2.6.5-7.283.orig/drivers/block/ll_rw_blk.c	2006-12-01 17:41:03.000000000 +0200
-+++ linux-2.6.5-7.283/drivers/block/ll_rw_blk.c	2007-05-29 15:03:34.000000000 +0300
-@@ -2494,6 +2494,8 @@ static inline int attempt_front_merge(re
+Index: linux-2.6.9/drivers/block/ll_rw_blk.c
+===================================================================
+--- linux-2.6.9.orig/drivers/block/ll_rw_blk.c
++++ linux-2.6.9/drivers/block/ll_rw_blk.c
+@@ -2326,6 +2326,8 @@ static inline int attempt_front_merge(re
  	return 0;
  }
  
@@ -10,9 +11,9 @@ diff -rup linux-2.6.5-7.283.orig/drivers/block/ll_rw_blk.c linux-2.6.5-7.283/dri
  /**
   * blk_attempt_remerge  - attempt to remerge active head with next request
   * @q:    The &request_queue_t belonging to the device
-@@ -2607,6 +2609,13 @@ again:
- 				elv_merged_request(q, req);
- 			goto out;
+@@ -2631,6 +2633,13 @@ end_io:
+ 		if (test_bit(QUEUE_FLAG_DEAD, &q->queue_flags))
+ 			goto end_io;
  
 +		/* this is cfs's dev_rdonly check */
 +		if (bio->bi_rw == WRITE &&
@@ -22,10 +23,10 @@ diff -rup linux-2.6.5-7.283.orig/drivers/block/ll_rw_blk.c linux-2.6.5-7.283/dri
 +		}
 +
  		/*
- 		 * elevator says don't/can't merge. get new request
- 		 */
-@@ -3445,6 +3454,92 @@ EXPORT_SYMBOL(dev_clear_rdonly);
- EXPORT_SYMBOL(dev_check_rdonly);
+ 		 * If this device has partitions, remap block n
+ 		 * of partition p to block n+start(p) of the disk.
+@@ -3180,6 +3189,92 @@ void swap_io_context(struct io_context *
+ 
  
  /*
 + * Debug code for turning block devices "read-only" (will discard writes
@@ -117,9 +118,10 @@ diff -rup linux-2.6.5-7.283.orig/drivers/block/ll_rw_blk.c linux-2.6.5-7.283/dri
   * sysfs parts below
   */
  struct queue_sysfs_entry {
-diff -rup linux-2.6.5-7.283.orig/fs/block_dev.c linux-2.6.5-7.283/fs/block_dev.c
---- linux-2.6.5-7.283.orig/fs/block_dev.c	2006-12-01 17:39:59.000000000 +0200
-+++ linux-2.6.5-7.283/fs/block_dev.c	2007-05-29 15:04:56.000000000 +0300
+Index: linux-2.6.9/fs/block_dev.c
+===================================================================
+--- linux-2.6.9.orig/fs/block_dev.c
++++ linux-2.6.9/fs/block_dev.c
 @@ -60,6 +60,7 @@ static void kill_bdev(struct block_devic
  {
  	invalidate_bdev(bdev, 1);
@@ -128,12 +130,13 @@ diff -rup linux-2.6.5-7.283.orig/fs/block_dev.c linux-2.6.5-7.283/fs/block_dev.c
  }	
  
  int set_blocksize(struct block_device *bdev, int size)
-diff -rup linux-2.6.5-7.283.orig/include/linux/fs.h linux-2.6.5-7.283/include/linux/fs.h
---- linux-2.6.5-7.283.orig/include/linux/fs.h	2006-12-01 17:40:58.000000000 +0200
-+++ linux-2.6.5-7.283/include/linux/fs.h	2007-05-29 15:03:34.000000000 +0300
-@@ -1422,6 +1422,10 @@ extern void file_kill(struct file *f);
+Index: linux-2.6.9/include/linux/fs.h
+===================================================================
+--- linux-2.6.9.orig/include/linux/fs.h
++++ linux-2.6.9/include/linux/fs.h
+@@ -1492,6 +1492,10 @@ extern void file_kill(struct file *f);
  struct bio;
- extern int submit_bio(int, struct bio *);
+ extern void submit_bio(int, struct bio *);
  extern int bdev_read_only(struct block_device *);
 +#define HAVE_CLEAR_RDONLY_ON_PUT
 +void dev_set_rdonly(struct block_device *bdev);