netdev - Re: [PATCH v3 02/13] mm: introduce execmem_text_alloc() and execmem

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Message-ID: <CAPhsuW4bQY5fo_+K2z4uUdd4r0wYF1eT3bAya=YqcEcmqdGXvg@mail.gmail.com>
Date: Thu, 21 Sep 2023 15:10:26 -0700
From: Song Liu <song@...nel.org>
To: Mike Rapoport <rppt@...nel.org>
Cc: linux-kernel@...r.kernel.org, Andrew Morton <akpm@...ux-foundation.org>, 
	Björn Töpel <bjorn@...nel.org>, 
	Catalin Marinas <catalin.marinas@....com>, Christophe Leroy <christophe.leroy@...roup.eu>, 
	"David S. Miller" <davem@...emloft.net>, Dinh Nguyen <dinguyen@...nel.org>, 
	Heiko Carstens <hca@...ux.ibm.com>, Helge Deller <deller@....de>, Huacai Chen <chenhuacai@...nel.org>, 
	Kent Overstreet <kent.overstreet@...ux.dev>, Luis Chamberlain <mcgrof@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, Michael Ellerman <mpe@...erman.id.au>, 
	Nadav Amit <nadav.amit@...il.com>, "Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>, 
	Palmer Dabbelt <palmer@...belt.com>, Puranjay Mohan <puranjay12@...il.com>, 
	Rick Edgecombe <rick.p.edgecombe@...el.com>, Russell King <linux@...linux.org.uk>, 
	Steven Rostedt <rostedt@...dmis.org>, Thomas Bogendoerfer <tsbogend@...ha.franken.de>, 
	Thomas Gleixner <tglx@...utronix.de>, Will Deacon <will@...nel.org>, bpf@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-mips@...r.kernel.org, 
	linux-mm@...ck.org, linux-modules@...r.kernel.org, 
	linux-parisc@...r.kernel.org, linux-riscv@...ts.infradead.org, 
	linux-s390@...r.kernel.org, linux-trace-kernel@...r.kernel.org, 
	linuxppc-dev@...ts.ozlabs.org, loongarch@...ts.linux.dev, 
	netdev@...r.kernel.org, sparclinux@...r.kernel.org, x86@...nel.org
Subject: Re: [PATCH v3 02/13] mm: introduce execmem_text_alloc() and execmem_free()

On Mon, Sep 18, 2023 at 12:30 AM Mike Rapoport <rppt@...nel.org> wrote:
>
[...]
> +
> +#include <linux/mm.h>
> +#include <linux/vmalloc.h>
> +#include <linux/execmem.h>
> +#include <linux/moduleloader.h>
> +
> +static void *execmem_alloc(size_t size)
> +{
> +       return module_alloc(size);
> +}
> +
> +void *execmem_text_alloc(enum execmem_type type, size_t size)
> +{
> +       return execmem_alloc(size);
> +}

execmem_text_alloc (and later execmem_data_alloc) both take "type" as
input. I guess we can just use execmem_alloc(type, size) for everything?

Thanks,
Song

> +
> +void execmem_free(void *ptr)
> +{
> +       /*
> +        * This memory may be RO, and freeing RO memory in an interrupt is not
> +        * supported by vmalloc.
> +        */
> +       WARN_ON(in_interrupt());
> +       vfree(ptr);
> +}
> --
> 2.39.2
>