This is a note to let you know that I've just added the patch titled ARM: 9155/1: fix early early_iounmap() to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: arm-9155-1-fix-early-early_iounmap.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 0d08e7bf0d0d1a29aff7b16ef516f7415eb1aa05 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= <mirq-linux@xxxxxxxxxxxx> Date: Thu, 4 Nov 2021 17:28:28 +0100 Subject: ARM: 9155/1: fix early early_iounmap() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Michał Mirosław <mirq-linux@xxxxxxxxxxxx> commit 0d08e7bf0d0d1a29aff7b16ef516f7415eb1aa05 upstream. Currently __set_fixmap() bails out with a warning when called in early boot from early_iounmap(). Fix it, and while at it, make the comment a bit easier to understand. Cc: <stable@xxxxxxxxxxxxxxx> Fixes: b089c31c519c ("ARM: 8667/3: Fix memory attribute inconsistencies when using fixmap") Acked-by: Ard Biesheuvel <ardb@xxxxxxxxxx> Signed-off-by: Michał Mirosław <mirq-linux@xxxxxxxxxxxx> Signed-off-by: Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/arm/mm/mmu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -416,9 +416,9 @@ void __set_fixmap(enum fixed_addresses i FIXADDR_END); BUG_ON(idx >= __end_of_fixed_addresses); - /* we only support device mappings until pgprot_kernel has been set */ + /* We support only device mappings before pgprot_kernel is set. */ if (WARN_ON(pgprot_val(prot) != pgprot_val(FIXMAP_PAGE_IO) && - pgprot_val(pgprot_kernel) == 0)) + pgprot_val(prot) && pgprot_val(pgprot_kernel) == 0)) return; if (pgprot_val(prot)) Patches currently in stable-queue which might be from mirq-linux@xxxxxxxxxxxx are queue-4.19/arm-9155-1-fix-early-early_iounmap.patch