A new commit in LLVM causes an error on the use of 'long double' when '-mno-x87' is used, which the kernel does through an alias, '-mno-80387' (see the LLVM commit below for more details around why it does this). drivers/usb/dwc2/hcd_queue.c:1744:25: error: expression requires 'long double' type support, but target 'x86_64-unknown-linux-gnu' does not support it delay = ktime_set(0, DWC2_RETRY_WAIT_DELAY); ^ drivers/usb/dwc2/hcd_queue.c:62:34: note: expanded from macro 'DWC2_RETRY_WAIT_DELAY' #define DWC2_RETRY_WAIT_DELAY (1 * 1E6L) ^ 1 error generated. This happens due to the use of a 'long double' literal. The 'E6' part of '1E6L' causes the literal to be a 'double' then the 'L' suffix promotes it to 'long double'. There is no visible reason for a floating point value in this driver, as the value is only used as a parameter to a function that expects an integer type. Use USEC_PER_SEC, which is the same integer value as '1E6L', to avoid changing functionality but fix the error. Fixes: 6ed30a7d8ec2 ("usb: dwc2: host: use hrtimer for NAK retries") Link: https://github.com/ClangBuiltLinux/linux/issues/1497 Link: https://github.com/llvm/llvm-project/commit/a8083d42b1c346e21623a1d36d1f0cadd7801d83 Signed-off-by: Nathan Chancellor <nathan@xxxxxxxxxx> --- drivers/usb/dwc2/hcd_queue.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/dwc2/hcd_queue.c b/drivers/usb/dwc2/hcd_queue.c index 89a788326c56..bdf1927e1be1 100644 --- a/drivers/usb/dwc2/hcd_queue.c +++ b/drivers/usb/dwc2/hcd_queue.c @@ -59,7 +59,7 @@ #define DWC2_UNRESERVE_DELAY (msecs_to_jiffies(5)) /* If we get a NAK, wait this long before retrying */ -#define DWC2_RETRY_WAIT_DELAY (1 * 1E6L) +#define DWC2_RETRY_WAIT_DELAY (1 * USEC_PER_SEC) /** * dwc2_periodic_channel_available() - Checks that a channel is available for a base-commit: d4439a1189f93d0ac1eaf0197db8e6b3e197d5c7 -- 2.34.0.rc0