dm-verity-fec: move computation of offset and rsb down a level

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verity_fec_decode() computes (offset, rsb) from the target block index
and calls fec_decode_rsb() with these parameters.  Move this computation
into fec_decode_rsb(), and rename fec_decode_rsb() to fec_decode().

This ends up being simpler and enables further refactoring, specifically
making use of the quotient from the division more easily.  The function
renaming also eliminates a reference to the ambiguous term "rsb".

This change does mean the same div64_u64_rem() can now be executed twice
per block, since verity_fec_decode() calls fec_decode() up to twice per
block.  However, this cost is negligible compared to the rest of FEC.

Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>

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Eric Biggers 2026-02-05 20:59:36 -08:00 • committed by Mikulas Patocka

parent 3ad2b952a3

commit ca0da6cc09

1 changed files with 18 additions and 28 deletions

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drivers/md/dm-verity-fec.c

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