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md: support bitmaps on RAID10 arrays larger then 2 terabytes 

.. and other arrays with components larger than 2 terabytes.

We use a "long" rather than a "sector_t" in part of the bitmap
size calculations, which is sad.

Reported-by: "Mario 'BitKoenig' Holbe" <Mario.Holbe@TU-Ilmenau.DE>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown 2009-04-20 11:50:24 +10:00
parent c03f6a1969
commit 1f59390339
1 changed files with 3 additions and 3 deletions
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6
drivers/md/bitmap.c
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@ -1590,7 +1590,7 @@ void bitmap_destroy(mddev_t *mddev)
int bitmap_create(mddev_t *mddev)
{
struct bitmap *bitmap;
unsigned long blocks = mddev->resync_max_sectors;
sector_t blocks = mddev->resync_max_sectors;
unsigned long chunks;
unsigned long pages;
struct file *file = mddev->bitmap_file;
@ -1632,8 +1632,8 @@ int bitmap_create(mddev_t *mddev)
bitmap->chunkshift = ffz(~bitmap->chunksize);
/* now that chunksize and chunkshift are set, we can use these macros */
chunks = (blocks + CHUNK_BLOCK_RATIO(bitmap) - 1) /
CHUNK_BLOCK_RATIO(bitmap);
chunks = (blocks + CHUNK_BLOCK_RATIO(bitmap) - 1) >>
CHUNK_BLOCK_SHIFT(bitmap);
pages = (chunks + PAGE_COUNTER_RATIO - 1) / PAGE_COUNTER_RATIO;
BUG_ON(!pages);