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From: Christoph Hellwig <hch@infradead.org>
To: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Will Deacon <will@kernel.org>,
	akpm@linux-foundation.org,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"K . Prasad" <prasad@linux.vnet.ibm.com>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	rostedt@goodmis.org, Alexei Starovoitov <ast@kernel.org>,
	linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [RFC PATCH 6/9] mm: export-GPL get_pageblock_migratetype
Date: Sun, 12 Apr 2020 01:14:54 -0700	[thread overview]
Message-ID: <20200412081454.GA7464@infradead.org> (raw)
In-Reply-To: <20200409193543.18115-7-mathieu.desnoyers@efficios.com>

On Thu, Apr 09, 2020 at 03:35:40PM -0400, Mathieu Desnoyers wrote:
> The macro include/linux/mmzone.h:get_pageblock_migratetype() uses
> the symbol get_pfnblock_flags_mask, which is not exported. That macro is
> used within the kmem and page_ref trace events to trace the migrate type
> of the target page.
> 
> Exporting this symbol to GPL modules allows GPL kernel tracers to be
> implemented as modules.

Which might make some sense if we had such intree modules (and then even
some as we could have higher level functions).  Without that is
obviously is a no-go.

  reply	other threads:[~2020-04-12  8:15 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-09 19:35 [RFC PATCH 0/9] Export information needed by the LTTng kernel tracer Mathieu Desnoyers
2020-04-09 19:35 ` [RFC PATCH 1/9] tracepoint: call vmalloc_sync_mappings() on registration Mathieu Desnoyers
2020-04-09 19:35 ` [RFC PATCH 2/9] bpf: allow up to 13 arguments for tracepoints Mathieu Desnoyers
2020-04-09 19:35 ` [RFC PATCH 3/9] writeback: tracing: pass global_wb_domain as tracepoint parameter Mathieu Desnoyers
2020-04-09 22:33   ` Alexei Starovoitov
2020-04-10 11:54     ` Mathieu Desnoyers
2020-04-09 19:35 ` [RFC PATCH 4/9] stacktrace: export-GPL stack_trace_save_user Mathieu Desnoyers
2020-04-12  8:31   ` Christoph Hellwig
2020-04-09 19:35 ` [RFC PATCH 5/9] sched: export-GPL task_prio Mathieu Desnoyers
2020-04-09 19:35 ` [RFC PATCH 6/9] mm: export-GPL get_pageblock_migratetype Mathieu Desnoyers
2020-04-12  8:14   ` Christoph Hellwig [this message]
2020-04-09 19:35 ` [RFC PATCH 7/9] block: genhd: export-GPL gendisk_name Mathieu Desnoyers
2020-04-09 19:35 ` [RFC PATCH 8/9] block: genhd: export-GPL generic disk device type Mathieu Desnoyers
2020-04-10  6:33   ` Greg Kroah-Hartman
2020-04-10 13:31     ` Mathieu Desnoyers
2020-04-10 15:44     ` Steven Rostedt
2020-04-11  6:45       ` Greg Kroah-Hartman
2020-04-09 19:35 ` [RFC PATCH 9/9] block: genhd: export-GPL generic disk block class Mathieu Desnoyers

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