From: Ard Biesheuvel <[email protected]> Using EFI runtime services to program the RTC to wake up the system is supported in theory, but rarely works in practice. Fortunately, this functionality is rarely [if ever] used to begin with so we can just drop it. (Note that the EFI rtc driver is not used by x86, which programs the CMOS rtc directly)
The same applies to GetNextHighMonoCount(), which, if implemented, usually relies on SetVariable() under the hood *, which is often not supported at runtime by non-x86 platforms. But it has no known users either so let's drop support for it as well. This means we need to drop the slightly pointless tests for it too. * EDK2 based EFI implementations usually have a MTC variable carrying the monotonic counter variable, which is therefore not truly monotonic, given that SetVariable() will happily overwrite it. Cc: Heinrich Schuchardt <[email protected]> Cc: Feng Tang <[email protected]> Cc: Alexandre Belloni <[email protected]> Cc: Juergen Gross <[email protected]> Cc: Stefano Stabellini <[email protected]> Cc: Oleksandr Tyshchenko <[email protected]> Cc: Sunil V L <[email protected]> Cc: Bibo Mao <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Ard Biesheuvel (3): efi-rtc: Remove wakeup functionality efi/test: Don't bother pseudo-testing unused EFI services efi: Remove support for pointless, unused EFI services arch/x86/platform/efi/efi_64.c | 22 ---- drivers/firmware/efi/runtime-wrappers.c | 68 ------------ drivers/firmware/efi/test/efi_test.c | 108 +------------------- drivers/rtc/rtc-efi.c | 76 +------------- drivers/xen/efi.c | 56 ---------- include/linux/efi.h | 6 -- 6 files changed, 4 insertions(+), 332 deletions(-) -- 2.50.0.727.gbf7dc18ff4-goog
