On Thu, Nov 29, 2018 at 03:28:44PM +0100, Ard Biesheuvel wrote:
On Thu, 29 Nov 2018 at 15:21, Greg Kroah-Hartman gregkh@linuxfoundation.org wrote:
4.9-stable review patch. If anyone has any objections, please let me know.
[ Upstream commit 33412b8673135b18ea42beb7f5117ed0091798b6 ]
Commit:
3ea86495aef2 ("efi/arm: preserve early mapping of UEFI memory map longer for BGRT")
deferred the unmap of the early mapping of the UEFI memory map to accommodate the ACPI BGRT code, which looks up the memory type that backs the BGRT table to validate it against the requirements of the UEFI spec.
Unfortunately, this causes problems on ARM, which does not permit early mappings to persist after paging_init() is called, resulting in a WARN() splat. Since we don't support the BGRT table on ARM anway, let's revert ARM to the old behaviour, which is to take down the early mapping at the end of efi_init().
Signed-off-by: Ard Biesheuvel ard.biesheuvel@linaro.org Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Peter Zijlstra peterz@infradead.org Cc: Thomas Gleixner tglx@linutronix.de Cc: linux-efi@vger.kernel.org Fixes: 3ea86495aef2 ("efi/arm: preserve early mapping of UEFI memory ...")
This commit is only in v4.19 as far as I know. Does it even apply?
This commit is in the following releases: 4.9.129 4.14.72 4.18.10 4.19
so it should apply :)
thanks,
greg k-h