Hi Sasha, On Thu, Jan 9, 2020 at 9:38 PM Sasha Levin <sashal@xxxxxxxxxx> wrote: > This is a note to let you know that I've just added the patch titled > > ARM: shmobile: defconfig: Restore debugfs support > > to the 5.4-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-shmobile-defconfig-restore-debugfs-support.patch > and it can be found in the queue-5.4 subdirectory. > > If you, or anyone else, feels it should not be added to the stable tree, > please let <stable@xxxxxxxxxxxxxxx> know about it. > > > > commit b56e3b1467eba2ba55bca05e3c8697b23304f12b > Author: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> > Date: Mon Dec 9 11:13:27 2019 +0100 > > ARM: shmobile: defconfig: Restore debugfs support > > [ Upstream commit fa2cdb1762d15f701b83efa60b04f0d04e71bf89 ] > > Since commit 0e4a459f56c32d3e ("tracing: Remove unnecessary DEBUG_FS > dependency"), CONFIG_DEBUG_FS is no longer auto-enabled. This breaks AFAIK, that commit is not present in v5.4, and hasn't been backported yet. So I don't think there is a need to backport this and all other fixes restoring debugfs support in post-v5.4 kernels. BTW, I noticed you plan to backport this "fix" not just to v5.4, but also to v4.19? > booting Debian 9, as systemd needs debugfs: > > [FAILED] Failed to mount /sys/kernel/debug. > See 'systemctl status sys-kernel-debug.mount' for details. > [DEPEND] Dependency failed for Local File Systems. > ... > You are in emergGive root password for maintenance > (or press Control-D to continue): > > Fix this by enabling CONFIG_DEBUG_FS explicitly. > > See also commit 18977008f44c66bd ("ARM: multi_v7_defconfig: Restore > debugfs support"). > > Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> > Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@xxxxxxxxxxxx> > Link: https://lore.kernel.org/r/20191209101327.26571-1-geert+renesas@xxxxxxxxx > Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> > > diff --git a/arch/arm/configs/shmobile_defconfig b/arch/arm/configs/shmobile_defconfig > index c6c70355141c..7e7b678ae153 100644 > --- a/arch/arm/configs/shmobile_defconfig > +++ b/arch/arm/configs/shmobile_defconfig > @@ -215,4 +215,5 @@ CONFIG_DMA_CMA=y > CONFIG_CMA_SIZE_MBYTES=64 > CONFIG_PRINTK_TIME=y > # CONFIG_ENABLE_MUST_CHECK is not set > +CONFIG_DEBUG_FS=y > CONFIG_DEBUG_KERNEL=y Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
