linux-kernel - Re: [RFC v2 0/7] linux: add linker tables

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Message-ID: <56C7781D.3040603@zytor.com>
Date:	Fri, 19 Feb 2016 12:16:29 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Luis R. Rodriguez" <mcgrof@...nel.org>, tglx@...utronix.de,
	mingo@...hat.com, bp@...en8.de
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org, luto@...capital.net,
	boris.ostrovsky@...cle.com, rusty@...tcorp.com.au,
	david.vrabel@...rix.com, konrad.wilk@...cle.com, mcb30@...e.org,
	jgross@...e.com, ming.lei@...onical.com,
	gregkh@...uxfoundation.org, arnd@...db.de,
	linux-arch@...r.kernel.org, linux@....linux.org.uk,
	benh@...nel.crashing.org, jbaron@...mai.com, ananth@...ibm.com,
	anil.s.keshavamurthy@...el.com, davem@...emloft.net,
	masami.hiramatsu.pt@...achi.com, andriy.shevchenko@...ux.intel.com,
	dwmw2@...radead.org, xen-devel@...ts.xensource.com
Subject: Re: [RFC v2 0/7] linux: add linker tables

On 02/19/2016 05:45 AM, Luis R. Rodriguez wrote:
> This is my v2 of the original linker table work [0], now with
> six proof of concepts ports of existing code using custom section
> with custom linker script modifications:
> 
>   * DEFINE_LINKTABLE_TEXT(char, kprobes);
>   * DEFINE_LINKTABLE_DATA(struct jump_entry, __jump_table);
>   * DEFINE_LINKTABLE_DATA(struct _ddebug, __verbose);
>   * DEFINE_LINKTABLE_RO(struct builtin_fw, builtin_fw);
>   * DEFINE_LINKTABLE_INIT(struct x86_init_fn, x86_init_fns);
>   * DEFINE_LINKTABLE_INIT_DATA(unsigned long, _kprobe_blacklist);
> 
> I've tested all except jump tables, I'd appreaciate some help with that.
> 

We should add support for read-mostly, probably.  In fact, some of these
probably *are* read-mostly.

	-hpa