On Tue, Sep 13, 2022 at 12:27:44AM +0900, Sergey Senozhatsky wrote: > zram_table_entry::flags stores object size in the lower bits and > zram pageflags in the upper bits. However, for some reason, we > use 24 lower bits, while maximum zram object size is PAGE_SIZE, > which requires PAGE_SHIFT bits (up to 16 on arm64). This wastes > 24 - PAGE_SHIFT bits that we can use for additional zram pageflags > instead. > > Also add a BUILD_BUG_ON() to alert us should we run out of bits > in zram_table_entry::flags. > > Signed-off-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx> Acked-by: Minchan Kim <minchan@xxxxxxxxxx>
