Hi Heikki, I love your patch! Perhaps something to improve: [auto build test WARNING on usb/usb-testing] [cannot apply to v5.4-rc4 next-20191021] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Heikki-Krogerus/usb-typec-API-improvements/20191022-013906 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing reproduce: # apt-get install sparse # sparse version: v0.6.1-dirty make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> drivers/usb/typec/ucsi/ucsi_acpi.c:54:9: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const *from @@ got void [noderevoid const *from @@ >> drivers/usb/typec/ucsi/ucsi_acpi.c:54:9: sparse: expected void const *from drivers/usb/typec/ucsi/ucsi_acpi.c:54:9: sparse: got void [noderef] <asn:2> * >> drivers/usb/typec/ucsi/ucsi_acpi.c:64:9: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *to @@ got void [noderef] <asvoid *to @@ >> drivers/usb/typec/ucsi/ucsi_acpi.c:64:9: sparse: expected void *to drivers/usb/typec/ucsi/ucsi_acpi.c:64:9: sparse: got void [noderef] <asn:2> * vim +54 drivers/usb/typec/ucsi/ucsi_acpi.c 43 44 static int ucsi_acpi_read(struct ucsi *ucsi, unsigned int offset, 45 void *val, size_t val_len) 46 { 47 struct ucsi_acpi *ua = ucsi_get_drvdata(ucsi); 48 int ret; 49 50 ret = ucsi_acpi_dsm(ua, UCSI_DSM_FUNC_READ); 51 if (ret) 52 return ret; 53 > 54 memcpy(val, ua->base + offset, val_len); 55 56 return 0; 57 } 58 59 static int ucsi_acpi_async_write(struct ucsi *ucsi, unsigned int offset, 60 const void *val, size_t val_len) 61 { 62 struct ucsi_acpi *ua = ucsi_get_drvdata(ucsi); 63 > 64 memcpy(ua->base + offset, val, val_len); 65 66 return ucsi_acpi_dsm(ua, UCSI_DSM_FUNC_WRITE); 67 } 68 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation