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From: Joerg Roedel <>
To: Guenter Roeck <>
Cc: Mike Rapoport <>,
	Linus Torvalds <>,
	Andrew Morton <>,
	Andy Lutomirski <>,
	Peter Zijlstra <>,
	Linux Kernel Mailing List <>
Subject: Re: [PATCH] mm/vmalloc: track which page-table levels were modified
Date: Tue, 9 Jun 2020 18:23:54 +0200	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Hi Guenter,

On Tue, Jun 09, 2020 at 07:15:42AM -0700, Guenter Roeck wrote:
> To build csky images, you have to disable CONFIG_FRAME_POINTER or use a
> non-upstream compiler. To build any images reliably, you have to disable
> CONFIG_GCC_PLUGIN_RANDSTRUCT or use a version of gcc old enough to not
> support it (gcc 6.x is fine). For mips, you have to specify ARCH and
> CROSS_COMPILE as environment variables.

My test setup builds defconfigs for all architectures using the gcc-9.3
based cross-compilers from (except the ones I have no
compiler for). That used to work for CSky and MIPS(64) when working on
my vmalloc changes.

On MIPS the build failure looks like some Makefile breakage, but I
didn't dive deeper into that.

For CSky the compiler complains about not supporting '-mbacktrace'.

> alpha is a lost case. The offending commit is 0f1c9688a19 ("tty/sysrq:
> alpha: export and use __sysrq_get_key_op()"); it looks like that wasn't
> build tested. It can not be reverted easily because of subsequent changes.

The below diff fixed the alpha build for me, but I am sure another fix
is already queued somewhere.

diff --git a/arch/alpha/kernel/setup.c b/arch/alpha/kernel/setup.c
index 6fa802c495b4..8f4ad63a3a9a 100644
--- a/arch/alpha/kernel/setup.c
+++ b/arch/alpha/kernel/setup.c
@@ -431,8 +431,13 @@ register_cpus(void)
+static void sysrq_reboot_handler(int unused)
+	machine_halt();
 static const struct sysrq_key_op srm_sysrq_reboot_op = {
-	.handler	= machine_halt,
+	.handler	= sysrq_reboot_handler,
 	.help_msg       = "reboot(b)",
 	.action_msg     = "Resetting",
 	.enable_mask    = SYSRQ_ENABLE_BOOT,

  reply	other threads:[~2020-06-09 16:24 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-03 23:23 [PATCH] mm/vmalloc: track which page-table levels were modified Guenter Roeck
2020-06-04  8:35 ` Joerg Roedel
2020-06-04 17:16   ` Linus Torvalds
2020-06-04 21:06     ` Andrew Morton
2020-06-04 21:12       ` Linus Torvalds
2020-06-05  8:16         ` Joerg Roedel
2020-06-05 10:00           ` Mike Rapoport
2020-06-09 12:10             ` Joerg Roedel
2020-06-09 14:15               ` Guenter Roeck
2020-06-09 16:23                 ` Joerg Roedel [this message]
2020-06-09 17:07                   ` Guenter Roeck
2020-06-10  7:59                 ` Mike Rapoport
2020-06-09 15:24               ` Mike Rapoport
2020-06-05  8:12     ` Joerg Roedel

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