md-bitmap: don't use ->index for pages backing the bitmap file

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The md driver allocates pages for storing the bitmap file data, which
are not page cache pages, and then stores the page granularity file
offset in page->index, which is a field that isn't really valid except
for page cache pages.

Use a separate index for the superblock, and use the scheme used at
read size to recalculate the index for the bitmap pages instead.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230615064840.629492-10-hch@lst.de

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Christoph Hellwig 2023-06-15 08:48:38 +02:00 • committed by Song Liu

parent f5f2d5ac9f

commit d7038f9518

2 changed files with 39 additions and 27 deletions

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65

drivers/md/md-bitmap.c

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1

drivers/md/md-bitmap.h

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