linux-kernel - Re: [PATCH v2 07/29] ARM: add kexec_file

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Message-ID: <20190125162106.axfhoxxdutkmaeh3@e5254000004ec.dyn.armlinux.org.uk>
Date:   Fri, 25 Jan 2019 16:21:06 +0000
From:   Russell King - ARM Linux admin <linux@...linux.org.uk>
To:     Catalin Marinas <catalin.marinas@....com>
Cc:     Arnd Bergmann <arnd@...db.de>, y2038@...ts.linaro.org,
        linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, mattst88@...il.com,
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Subject: Re: [PATCH v2 07/29] ARM: add kexec_file_load system call number

On Fri, Jan 25, 2019 at 03:43:59PM +0000, Catalin Marinas wrote:
> On Fri, Jan 18, 2019 at 05:18:13PM +0100, Arnd Bergmann wrote:
> > diff --git a/arch/arm/tools/syscall.tbl b/arch/arm/tools/syscall.tbl
> > index 86de9eb34296..20ed7e026723 100644
> > --- a/arch/arm/tools/syscall.tbl
> > +++ b/arch/arm/tools/syscall.tbl
> > @@ -415,3 +415,4 @@
> >  398	common	rseq			sys_rseq
> >  399	common	io_pgetevents		sys_io_pgetevents
> >  400	common	migrate_pages		sys_migrate_pages
> > +401	common	kexec_file_load		sys_kexec_file_load
> 
> I presume on arm32 this would still return -ENOSYS.

Yes, I already checked.  If CONFIG_KEXEC_FILE is not set, then
kernel/kexec_file.c is not built, and we fall back to the stub
in kernel/sys_ni.c.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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