Message-Id: <200610060306.k96366Vp015250@shell0.pdx.osdl.net>
Date:	Thu, 05 Oct 2006 20:06:06 -0700
From:	akpm@...l.org
To:	mm-commits@...r.kernel.org
Cc:	akpm@...l.org, linux-ext4@...r.kernel.org
Subject: + ext4-64-bit-divide-fix.patch added to -mm tree


The patch titled

     ext4 64 bit divide fix

has been added to the -mm tree.  Its filename is

     ext4-64-bit-divide-fix.patch

See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this

------------------------------------------------------
Subject: ext4 64 bit divide fix
From: Andrew Morton <akpm@...l.org>

With CONFIG_LBD=n, sector_div() expands to a plain old divide.  But ext4 is
_not_ passing in a sector_t as the first argument, so...

fs/built-in.o: In function `ext4_get_group_no_and_offset':
fs/ext4/balloc.c:39: undefined reference to `__umoddi3'
fs/ext4/balloc.c:41: undefined reference to `__udivdi3'
fs/built-in.o: In function `find_group_orlov':
fs/ext4/ialloc.c:278: undefined reference to `__udivdi3'
fs/built-in.o: In function `ext4_fill_super':
fs/ext4/super.c:1488: undefined reference to `__udivdi3'
fs/ext4/super.c:1488: undefined reference to `__umoddi3'
fs/ext4/super.c:1594: undefined reference to `__udivdi3'
fs/ext4/super.c:1601: undefined reference to `__umoddi3'

Fix that up by calling do_div() directly.

Also cast the arg to u64.  do_div() is only defined on u64, and ext4_fsblk_t
is supposed to be opaque.

Note especially the changes to find_group_orlov().  It was attempting to do

	do_div(int, unsigned long long);

which is royally screwed up.  Switched it to plain old divide.

Cc: <linux-ext4@...r.kernel.org>
Signed-off-by: Andrew Morton <akpm@...l.org>
---

 fs/ext4/balloc.c |    2 +-
 fs/ext4/ialloc.c |    6 +++---
 fs/ext4/super.c  |    4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff -puN fs/ext4/balloc.c~ext4-64-bit-divide-fix fs/ext4/balloc.c
--- a/fs/ext4/balloc.c~ext4-64-bit-divide-fix
+++ a/fs/ext4/balloc.c
@@ -34,7 +34,7 @@ void ext4_get_group_no_and_offset(struct
 	ext4_grpblk_t offset;
 
         blocknr = blocknr - le32_to_cpu(es->s_first_data_block);
-        offset = sector_div(blocknr, EXT4_BLOCKS_PER_GROUP(sb));
+	offset = do_div((u64)blocknr, EXT4_BLOCKS_PER_GROUP(sb));
 	if (offsetp)
 		*offsetp = offset;
 	if (blockgrpp)
diff -puN fs/ext4/ialloc.c~ext4-64-bit-divide-fix fs/ext4/ialloc.c
--- a/fs/ext4/ialloc.c~ext4-64-bit-divide-fix
+++ a/fs/ext4/ialloc.c
@@ -275,7 +275,7 @@ static int find_group_orlov(struct super
 	avefreei = freei / ngroups;
 	freeb = percpu_counter_read_positive(&sbi->s_freeblocks_counter);
 	avefreeb = freeb;
-	sector_div(avefreeb, ngroups);
+	do_div((u64)avefreeb, ngroups);
 	ndirs = percpu_counter_read_positive(&sbi->s_dirs_counter);
 
 	if ((parent == sb->s_root->d_inode) ||
@@ -305,14 +305,14 @@ static int find_group_orlov(struct super
 	}
 
 	blocks_per_dir = ext4_blocks_count(es) - freeb;
-	sector_div(blocks_per_dir, ndirs);
+	do_div((u64)blocks_per_dir, ndirs);
 
 	max_dirs = ndirs / ngroups + inodes_per_group / 16;
 	min_inodes = avefreei - inodes_per_group / 4;
 	min_blocks = avefreeb - EXT4_BLOCKS_PER_GROUP(sb) / 4;
 
 	max_debt = EXT4_BLOCKS_PER_GROUP(sb);
-	sector_div(max_debt, max(blocks_per_dir, (ext4_fsblk_t)BLOCK_COST));
+	max_debt /= max_t(int, blocks_per_dir, BLOCK_COST);
 	if (max_debt * INODE_COST > inodes_per_group)
 		max_debt = inodes_per_group / INODE_COST;
 	if (max_debt > 255)
diff -puN fs/ext4/super.c~ext4-64-bit-divide-fix fs/ext4/super.c
--- a/fs/ext4/super.c~ext4-64-bit-divide-fix
+++ a/fs/ext4/super.c
@@ -1485,7 +1485,7 @@ static int ext4_fill_super (struct super
 	 */
 	if (blocksize != EXT4_MIN_BLOCK_SIZE) {
 		logic_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE;
-		offset = sector_div(logic_sb_block, blocksize);
+		offset = do_div((u64)logic_sb_block, blocksize);
 	} else {
 		logic_sb_block = sb_block;
 	}
@@ -1591,7 +1591,7 @@ static int ext4_fill_super (struct super
 		brelse (bh);
 		sb_set_blocksize(sb, blocksize);
 		logic_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE;
-		offset = sector_div(logic_sb_block, blocksize);
+		offset = do_div((u64)logic_sb_block, blocksize);
 		bh = sb_bread(sb, logic_sb_block);
 		if (!bh) {
 			printk(KERN_ERR
_

Patches currently in -mm which might be from akpm@...l.org are

i386-irqs-build-fix.patch
kauditd_thread-warning-fix.patch
revert-pci-quirk-for-ibm-dock-ii-cardbus-controllers.patch
fix-warn_on--warn_on_once-regression.patch
ext4_blk_type_from_sector_t_to_ulonglong-fix.patch
ext4-uninline-ext4_get_group_no_and_offset.patch
ext4-64-bit-divide-fix.patch
ext4-rename-logic_sb_block.patch
git-acpi.patch
acpi-preserve-correct-battery-state-through-suspend-resume-cycles-tidy.patch
acpi-asus-s3-resume-fix.patch
sony_apci-resume.patch
git-cifs-fixup.patch
cifs-kconfig-dont-select-connector.patch
w1-kconfig-fix.patch
git-geode-fixup.patch
git-input-fixup.patch
revert-input-make-input_openclose_device-more-robust.patch
libata-return-sense-data-in-hdio_drive_cmd-ioctl-tidy.patch
forcedeth-power-management-support-tidy.patch
drivers-net-ns83820c-add-paramter-to-disable-auto.patch
git-pcmcia-fixup.patch
git-serial-fixup.patch
pci-optionally-sort-device-lists-breadth-first-tweaks.patch
pci-optionally-sort-device-lists-breadth-first-force-on.patch
git-scsi-target-fixup.patch
git-scsi-target-vs-git-block.patch
xpad-dance-pad-support-tidy.patch
git-watchdog.patch
revert-x86_64-mm-mask-alignment.patch
x86_64-dump_trace-atomicity-fix.patch
spinlock-debug-all-cpu-backtrace.patch
spinlock-debug-all-cpu-backtrace-fix.patch
spinlock-debug-all-cpu-backtrace-fix-2.patch
spinlock-debug-all-cpu-backtrace-fix-3.patch
xfs-rename-uio_read.patch
get-rid-of-zone_table.patch
slab-reduce-numa-text-size-tidy.patch
swap-token-new-scheme-to-preempt-token-tidy.patch
radix-tree-rcu-lockless-readside.patch
acx1xx-wireless-driver.patch
swsusp-add-resume_offset-command-line-parameter-rev-2.patch
deprecate-smbfs-in-favour-of-cifs.patch
edac-new-opteron-athlon64-memory-controller-driver.patch
add-address_space_operationsbatch_write.patch
add-config_headers_check-option-to-automatically-run-make-headers_check-nobble.patch
kbuild-dont-put-temp-files-in-the-source-tree.patch
grow_buffers-infinite-loop-fix.patch
invalidate_inode_pages2_range-debug.patch
generic-implementatation-of-bug.patch
generic-implementatation-of-bug-fix.patch
generic-bug-for-i386.patch
generic-bug-for-x86-64.patch
fs-cache-make-kafs-use-fs-cache-fix.patch
fs-cache-make-kafs-use-fs-cache-vs-streamline-generic_file_-interfaces-and-filemap.patch
nfs-use-local-caching-12-fix.patch
swap_prefetch-vs-zoned-counters.patch
readahead-sysctl-parameters.patch
make-copy_from_user_inatomic-not-zero-the-tail-on-i386-vs-reiser4.patch
make-kmem_cache_destroy-return-void-reiser4.patch
reiser4-hardirq-include-fix.patch
reiser4-run-truncate_inode_pages-in-reiser4_delete_inode.patch
reiser4-get_sb_dev-fix.patch
reiser4-vs-zoned-allocator.patch
reiser4-rename-generic_sounding_globalspatch-fix.patch
hpt3xx-rework-rate-filtering-tidy.patch
kevent-core-files-fix.patch
kevent-core-files-s390-hack.patch
kevent-socket-notifications-fix-2.patch
kevent-socket-notifications-fix-4.patch
nr_blockdev_pages-in_interrupt-warning.patch
device-suspend-debug.patch
slab-leaks3-default-y.patch
x86-kmap_atomic-debugging.patch
restore-rogue-readahead-printk.patch
put_bh-debug.patch
acpi_format_exception-debug.patch
jmicron-warning-fix.patch
squash-ipc-warnings.patch
squash-transmeta-warnings.patch
squash-udf-warnings.patch

-
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Powered by blists - more mailing lists