[PATCH 11/12] ufs: get rid of ubh_{ubhcpymem,memcpyubh}()

[Al Viro <viro@zeniv.linux.org.uk>]

used only in ufs_read_cylinder_structures()/ufs_put_super_internal()
and there we can just as well avoid bothering with ufs_buffer_head
and just deal with it fragment-by-fragment.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/ufs/super.c | 45 +++++++++++++++++----------------------------
 fs/ufs/util.c  | 46 ----------------------------------------------
 fs/ufs/util.h  |  5 -----
 3 files changed, 17 insertions(+), 79 deletions(-)

diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index a480810cd4e3..ccdfd4cb2682 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -505,7 +505,6 @@ static int ufs_read_cylinder_structures(struct super_block *sb)
 {
 	struct ufs_sb_info *sbi = UFS_SB(sb);
 	struct ufs_sb_private_info *uspi = sbi->s_uspi;
-	struct ufs_buffer_head * ubh;
 	unsigned char * base, * space;
 	unsigned size, blks, i;
 
@@ -521,21 +520,13 @@ static int ufs_read_cylinder_structures(struct super_block *sb)
 	if (!base)
 		goto failed; 
 	sbi->s_csp = (struct ufs_csum *)space;
-	for (i = 0; i < blks; i += uspi->s_fpb) {
-		size = uspi->s_bsize;
-		if (i + uspi->s_fpb > blks)
-			size = (blks - i) * uspi->s_fsize;
-
-		ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
-		
-		if (!ubh)
+	for (i = 0; i < blks; i++) {
+		struct buffer_head *bh = sb_bread(sb, uspi->s_csaddr + i);
+		if (!bh)
 			goto failed;
-
-		ubh_ubhcpymem (space, ubh, size);
-
-		space += size;
-		ubh_brelse (ubh);
-		ubh = NULL;
+		memcpy(space, bh->b_data, uspi->s_fsize);
+		space += uspi->s_fsize;
+		brelse (bh);
 	}
 
 	/*
@@ -645,7 +636,6 @@ static void ufs_put_super_internal(struct super_block *sb)
 {
 	struct ufs_sb_info *sbi = UFS_SB(sb);
 	struct ufs_sb_private_info *uspi = sbi->s_uspi;
-	struct ufs_buffer_head * ubh;
 	unsigned char * base, * space;
 	unsigned blks, size, i;
 
@@ -656,18 +646,17 @@ static void ufs_put_super_internal(struct super_block *sb)
 	size = uspi->s_cssize;
 	blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
 	base = space = (char*) sbi->s_csp;
-	for (i = 0; i < blks; i += uspi->s_fpb) {
-		size = uspi->s_bsize;
-		if (i + uspi->s_fpb > blks)
-			size = (blks - i) * uspi->s_fsize;
-
-		ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
-
-		ubh_memcpyubh (ubh, space, size);
-		space += size;
-		ubh_mark_buffer_uptodate (ubh, 1);
-		ubh_mark_buffer_dirty (ubh);
-		ubh_brelse (ubh);
+	for (i = 0; i < blks; i++, space += uspi->s_fsize) {
+		struct buffer_head *bh = sb_bread(sb, uspi->s_csaddr + i);
+
+		if (unlikely(!bh)) { // better than an oops...
+			ufs_panic(sb, __func__,
+				"can't write part of cylinder group summary");
+			continue;
+		}
+		memcpy(bh->b_data, space, uspi->s_fsize);
+		mark_buffer_dirty(bh);
+		brelse(bh);
 	}
 	for (i = 0; i < sbi->s_cg_loaded; i++) {
 		ufs_put_cylinder (sb, i);
diff --git a/fs/ufs/util.c b/fs/ufs/util.c
index 13ba34e6d64f..535c7ee80a10 100644
--- a/fs/ufs/util.c
+++ b/fs/ufs/util.c
@@ -99,20 +99,6 @@ void ubh_mark_buffer_dirty (struct ufs_buffer_head * ubh)
 		mark_buffer_dirty (ubh->bh[i]);
 }
 
-void ubh_mark_buffer_uptodate (struct ufs_buffer_head * ubh, int flag)
-{
-	unsigned i;
-	if (!ubh)
-		return;
-	if (flag) {
-		for ( i = 0; i < ubh->count; i++ )
-			set_buffer_uptodate (ubh->bh[i]);
-	} else {
-		for ( i = 0; i < ubh->count; i++ )
-			clear_buffer_uptodate (ubh->bh[i]);
-	}
-}
-
 void ubh_sync_block(struct ufs_buffer_head *ubh)
 {
 	if (ubh) {
@@ -146,38 +132,6 @@ int ubh_buffer_dirty (struct ufs_buffer_head * ubh)
 	return result;
 }
 
-void _ubh_ubhcpymem_(struct ufs_sb_private_info * uspi, 
-	unsigned char * mem, struct ufs_buffer_head * ubh, unsigned size)
-{
-	unsigned len, bhno;
-	if (size > (ubh->count << uspi->s_fshift))
-		size = ubh->count << uspi->s_fshift;
-	bhno = 0;
-	while (size) {
-		len = min_t(unsigned int, size, uspi->s_fsize);
-		memcpy (mem, ubh->bh[bhno]->b_data, len);
-		mem += uspi->s_fsize;
-		size -= len;
-		bhno++;
-	}
-}
-
-void _ubh_memcpyubh_(struct ufs_sb_private_info * uspi, 
-	struct ufs_buffer_head * ubh, unsigned char * mem, unsigned size)
-{
-	unsigned len, bhno;
-	if (size > (ubh->count << uspi->s_fshift))
-		size = ubh->count << uspi->s_fshift;
-	bhno = 0;
-	while (size) {
-		len = min_t(unsigned int, size, uspi->s_fsize);
-		memcpy (ubh->bh[bhno]->b_data, mem, len);
-		mem += uspi->s_fsize;
-		size -= len;
-		bhno++;
-	}
-}
-
 dev_t
 ufs_get_inode_dev(struct super_block *sb, struct ufs_inode_info *ufsi)
 {
diff --git a/fs/ufs/util.h b/fs/ufs/util.h
index 6fff3da93a66..eb6943fa7fa4 100644
--- a/fs/ufs/util.h
+++ b/fs/ufs/util.h
@@ -263,14 +263,9 @@ extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info *, str
 extern void ubh_brelse (struct ufs_buffer_head *);
 extern void ubh_brelse_uspi (struct ufs_sb_private_info *);
 extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *);
-extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head *, int);
 extern void ubh_sync_block(struct ufs_buffer_head *);
 extern void ubh_bforget (struct ufs_buffer_head *);
 extern int  ubh_buffer_dirty (struct ufs_buffer_head *);
-#define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size)
-extern void _ubh_ubhcpymem_(struct ufs_sb_private_info *, unsigned char *, struct ufs_buffer_head *, unsigned);
-#define ubh_memcpyubh(ubh,mem,size) _ubh_memcpyubh_(uspi,ubh,mem,size)
-extern void _ubh_memcpyubh_(struct ufs_sb_private_info *, struct ufs_buffer_head *, unsigned char *, unsigned);
 
 /* This functions works with cache pages*/
 struct folio *ufs_get_locked_folio(struct address_space *mapping, pgoff_t index);
-- 
2.39.2