linux-kernel - Re: [PATCH v5 2/6] vmalloc: Add text_alloc() and text

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Date:   Sat, 25 Jul 2020 05:20:00 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Mike Rapoport <rppt@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Andi Kleen <ak@...ux.intel.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v5 2/6] vmalloc: Add text_alloc() and text_free()

On Fri, Jul 24, 2020 at 01:22:43PM +0300, Mike Rapoport wrote:
> On Fri, Jul 24, 2020 at 08:05:49AM +0300, Jarkko Sakkinen wrote:
> > Introduce functions for allocating memory for dynamic trampolines, such
> > as kprobes. An arch can promote the availability of these functions with
> > CONFIG_ARCH_HAS_TEXT_ALLOC.
> 
> As it was pointed out at the discussion on the previous version [1],
> text_alloc() alone won't necessarily suit other architectures.
>  
> I don't see a point in defining a "generic" interface that apriory could
> not be imeplemented by several architectures.
> 
> [1] https://lore.kernel.org/lkml/20200714094625.1443261-1-jarkko.sakkinen@linux.intel.com/

These changes do actually acknowledge the feedback [1][2][3]. They do not
interfere with module_alloc() and are fully optional.

[1] https://lore.kernel.org/linux-riscv/20200714102826.GB4756@willie-the-truck/
[2] https://lore.kernel.org/linux-riscv/20200714164245.GE1551@shell.armlinux.org.uk/
[3] https://lore.kernel.org/linux-riscv/20200714135651.GA27819@linux-8ccs/

/Jarkko