From 3f71f6da7791a5feae0ff07e718431d1df01273a Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Thu, 11 Sep 2014 10:20:40 +0200 Subject: efi: rtc-efi: Export platform:rtc-efi as module alias When the rtc-efi driver is built as a module, we already register the EFI rtc as a platform device if UEFI Runtime Services are enabled. To wire it up to udev, and let the module be loaded automatically, we need to export the 'platform:rtc-efi' alias from the module. Signed-off-by: Ard Biesheuvel Cc: Alessandro Zummo Cc: Mark Salter Cc: Dave Young Signed-off-by: Matt Fleming --- drivers/rtc/rtc-efi.c | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/rtc') diff --git a/drivers/rtc/rtc-efi.c b/drivers/rtc/rtc-efi.c index 8225b89de810..59a55e7abf78 100644 --- a/drivers/rtc/rtc-efi.c +++ b/drivers/rtc/rtc-efi.c @@ -235,3 +235,4 @@ module_platform_driver_probe(efi_rtc_driver, efi_rtc_probe); MODULE_AUTHOR("dann frazier "); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("EFI RTC driver"); +MODULE_ALIAS("platform:rtc-efi"); -- cgit v1.2.3 From 7efe665903d0d963b0ebf4cab25cc3ae32c62600 Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Fri, 3 Oct 2014 13:06:33 +0100 Subject: rtc: Disable EFI rtc for x86 commit da167ad7638759 ("rtc: ia64: allow other architectures to use EFI RTC") inadvertently introduced a regression for x86 because we've been careful not to enable the EFI rtc driver due to the generally buggy implementations of the time-related EFI runtime services. In fact, since the above commit was merged we've seen reports of crashes on 32-bit tablets, https://bugzilla.kernel.org/show_bug.cgi?id=84241#c21 Disable it explicitly for x86 so that we don't give users false hope that this driver will work - it won't, and your machine is likely to crash. Acked-by: Mark Salter Cc: Dave Young Cc: Alessandro Zummo Cc: # v3.17 Signed-off-by: Matt Fleming --- drivers/rtc/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/rtc') diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig index a168e96142b9..54ef393b0def 100644 --- a/drivers/rtc/Kconfig +++ b/drivers/rtc/Kconfig @@ -806,7 +806,7 @@ config RTC_DRV_DA9063 config RTC_DRV_EFI tristate "EFI RTC" - depends on EFI + depends on EFI && !X86 help If you say yes here you will get support for the EFI Real Time Clock. -- cgit v1.2.3