tree ec57e27d2654c9f74b72775f78b263401f365174
parent 6c1a808052ba6a875df7aa450b6df4b199f3a281
author Stefan Brüns <stefan.bruens@rwth-aachen.de> 1481930871 +0100
committer Tom Rini <trini@konsulko.com> 1482855854 -0500

fs/fat: merge readwrite get_fatent_value() with readonly get_fatent()

get_fatent_value(...) flushes changed FAT entries to disk when fetching
the next FAT blocks, in every other aspect it is identical to
get_fatent(...).

Provide a stub implementation for flush_dirty_fat_buffer if
CONFIG_FAT_WRITE is not set. Calling flush_dirty_fat_buffer during read
only operation is fine as it checks if any buffers needs flushing.

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Reviewed-by: Benoît Thébaudeau <benoit.thebaudeau.dev@gmail.com>