The 64bit limitation check is compiled and optimized out on 32bit platforms, but generates a type width warning:
drivers/mmc/tmio-common.c: In function ‘tmio_sd_addr_is_dmaable’: drivers/mmc/tmio-common.c:376:26: warning: right shift count >= width of type [-Wshift-count-overflow] 376 | if (addr >> 32) | ^~
Fix the warning by checking the addr type width to see whether the shift even makes sense in the first place. The width check is also optimized out at compile time.
Signed-off-by: Marek Vasut marek.vasut+renesas@mailbox.org --- Cc: Jaehoon Chung jh80.chung@samsung.com Cc: Peng Fan peng.fan@nxp.com --- V2: New patch --- drivers/mmc/tmio-common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/mmc/tmio-common.c b/drivers/mmc/tmio-common.c index e9c7d3a2e00..0b24a5a7bdb 100644 --- a/drivers/mmc/tmio-common.c +++ b/drivers/mmc/tmio-common.c @@ -373,7 +373,7 @@ static bool tmio_sd_addr_is_dmaable(struct mmc_data *data) if (!(data->flags & MMC_DATA_READ) && !IS_ALIGNED(addr, 128)) return false; /* Gen3 DMA has 32bit limit */ - if (addr >> 32) + if (sizeof(addr) > 4 && addr >> 32) return false; #endif