From: Andrew Morton <akpm@linux-foundation.org>
To: mrungta@google.com
Cc: Mayank Rungta via B4 Relay
<devnull+mrungta.google.com@kernel.org>,
Wim Van Sebroeck <wim@linux-watchdog.org>,
Guenter Roeck <linux@roeck-us.net>,
Tzung-Bi Shih <tzungbi@kernel.org>,
Douglas Anderson <dianders@chromium.org>,
linux-kernel@vger.kernel.org, linux-watchdog@vger.kernel.org
Subject: Re: [PATCH 1/2] nmi: Export CPU backtrace APIs for loadable modules
Date: Thu, 6 Aug 2026 16:44:04 -0700 [thread overview]
Message-ID: <20260806164404.aca27fe3593bb5c95828807d@linux-foundation.org> (raw)
In-Reply-To: <20260730-export-cpu-backtrace-apis-v1-1-bace8e1cb817@google.com>
On Thu, 30 Jul 2026 15:00:21 -0700 Mayank Rungta via B4 Relay <devnull+mrungta.google.com@kernel.org> wrote:
> From: Mayank Rungta <mrungta@google.com>
>
> Currently, CPU backtrace functions cannot be called from loadable
> modules because the underlying helper arch_trigger_cpumask_backtrace()
> is not exported.
>
> Instead of exporting arch_trigger_cpumask_backtrace() individually
> across every supported architecture, introduce and export a common
> helper, cpumask_backtrace(), in lib/nmi_backtrace.c. Update the four
> inline CPU backtrace macros in include/linux/nmi.h to route through this
> centralized helper.
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
next prev parent reply other threads:[~2026-08-06 23:44 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-30 22:00 [PATCH 0/2] watchdog: pretimeout: Allow building dump governor as module Mayank Rungta via B4 Relay
2026-07-30 22:00 ` [PATCH 1/2] nmi: Export CPU backtrace APIs for loadable modules Mayank Rungta via B4 Relay
2026-07-31 1:54 ` Doug Anderson
2026-08-06 21:40 ` Guenter Roeck
2026-08-06 23:44 ` Andrew Morton [this message]
2026-08-07 3:50 ` Guenter Roeck
2026-07-30 22:00 ` [PATCH 2/2] watchdog: pretimeout: Convert dump pretimeout governor to tristate Mayank Rungta via B4 Relay
2026-07-31 1:55 ` Doug Anderson
2026-08-01 12:38 ` Tzung-Bi Shih
2026-08-06 21:41 ` Guenter Roeck
2026-08-06 23:44 ` Andrew Morton
2026-08-07 3:50 ` Guenter Roeck
2026-07-30 22:50 ` [PATCH 0/2] watchdog: pretimeout: Allow building dump governor as module Andrew Morton
2026-07-30 23:39 ` Mayank Rungta
2026-07-31 21:01 ` Andrew Morton
2026-07-31 21:19 ` Guenter Roeck
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