39 lines
1.1 KiB
Diff
39 lines
1.1 KiB
Diff
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From: Liu Bo <liubo2009 <at> cn.fujitsu.com>
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Subject: [PATCH] Btrfs: use do_div to avoid compile errors on 32bit box
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Date: 2011-08-19 09:48:44 GMT (3 hours and 36 minutes ago)
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When doing div operation of u64 type, we need to be careful and use do_div
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to avoid compile ERROR on 32bit box:
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"ERROR: "__udivdi3" [fs/btrfs/btrfs.ko] undefined!
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make[1]: *** [__modpost] Error 1
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Signed-off-by: Liu Bo <liubo2009 <at> cn.fujitsu.com>
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---
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fs/btrfs/extent-tree.c | 4 ++--
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1 files changed, 2 insertions(+), 2 deletions(-)
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diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
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index 80d6148..9b495ce 100644
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--- a/fs/btrfs/extent-tree.c
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+++ b/fs/btrfs/extent-tree.c
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@@ -6796,14 +6796,14 @@ int btrfs_can_relocate(struct btrfs_root *root, u64 bytenr)
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index = get_block_group_index(block_group);
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if (index == 0) {
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dev_min = 4;
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- min_free /= 2;
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+ do_div(min_free, 2);
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} else if (index == 1) {
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dev_min = 2;
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} else if (index == 2) {
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min_free *= 2;
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} else if (index == 3) {
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dev_min = fs_devices->rw_devices;
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- min_free /= dev_min;
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+ do_div(min_free, dev_min);
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}
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mutex_lock(&root->fs_info->chunk_mutex);
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--
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1.6.5.2
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