[PATCH] Add "-o bh" option to ext3

[Badari Pulavarty <pbadari@us.ibm.com>]

Its not really need for now, but as we try to make "nobh"
as default option, it would be nice to have a "-obh" fallback
option - if things go wrong.

Thanks,
Badari

This patch adds "-o bh" option to force use of buffer_heads.
This option is needed when we make "nobh" as default -
and if we run into problems.

Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Index: linux-2.6.16-rc5/fs/ext3/super.c
===================================================================
--- linux-2.6.16-rc5.orig/fs/ext3/super.c	2006-02-26 21:09:35.000000000
-0800
+++ linux-2.6.16-rc5/fs/ext3/super.c	2006-03-10 10:31:26.000000000 -0800
@@ -628,7 +628,7 @@ enum {
 	Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic,
Opt_err_ro,
 	Opt_nouid32, Opt_nocheck, Opt_debug, Opt_oldalloc, Opt_orlov,
 	Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl,
-	Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh,
+	Opt_reservation, Opt_noreservation, Opt_noload, Opt_nobh, Opt_bh,
 	Opt_commit, Opt_journal_update, Opt_journal_inum, Opt_journal_dev,
 	Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback,
 	Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota,
@@ -664,6 +664,7 @@ static match_table_t tokens = {
 	{Opt_noreservation, "noreservation"},
 	{Opt_noload, "noload"},
 	{Opt_nobh, "nobh"},
+	{Opt_bh, "bh"},
 	{Opt_commit, "commit=%u"},
 	{Opt_journal_update, "journal=update"},
 	{Opt_journal_inum, "journal=%u"},
@@ -1011,6 +1012,9 @@ clear_qf_name:
 		case Opt_nobh:
 			set_opt(sbi->s_mount_opt, NOBH);
 			break;
+		case Opt_bh:
+			clear_opt(sbi->s_mount_opt, NOBH);
+			break;
 		default:
 			printk (KERN_ERR
 				"EXT3-fs: Unrecognized mount option \"%s\" "


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