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Message-ID: <7721365.qIlei5Urfx@wuerfel> Date: Fri, 20 Nov 2015 17:43:44 +0100 From: Arnd Bergmann <arnd@...db.de> To: Maxim Levitsky <maximlevitsky@...il.com> Cc: nico@...xnic.net, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: [PATCH] memstick: use sector_div instead of do_div do_div is the wrong way to divide a sector_t, as it is less efficient when sector_t is 32-bit wide. With the upcoming do_div optimizations, the kernel starts warning about this: drivers/memstick/core/ms_block.c: In function 'msb_io_work': include/asm-generic/div64.h:207:28: warning: comparison of distinct pointer types lacks a cast This changes the code to use sector_div instead, which always produces optimal code. Signed-off-by: Arnd Bergmann <arnd@...db.de> diff --git a/drivers/memstick/core/ms_block.c b/drivers/memstick/core/ms_block.c index 24f2f8473dee..84abf9d3c24e 100644 --- a/drivers/memstick/core/ms_block.c +++ b/drivers/memstick/core/ms_block.c @@ -1909,7 +1909,7 @@ static void msb_io_work(struct work_struct *work) lba = blk_rq_pos(msb->req); sector_div(lba, msb->page_size / 512); - page = do_div(lba, msb->pages_in_block); + page = sector_div(lba, msb->pages_in_block); if (rq_data_dir(msb->req) == READ) error = msb_do_read_request(msb, lba, page, sg, -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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