From: Yury Norov <yury.norov@gmail.com>
To: Mike Rapoport <rppt@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Andy Lutomirski <luto@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
Borislav Petkov <bp@alien8.de>,
Catalin Marinas <catalin.marinas@arm.com>,
Christopher Lameter <cl@linux.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
David Hildenbrand <david@redhat.com>,
Elena Reshetova <elena.reshetova@intel.com>,
"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
James Bottomley <jejb@linux.ibm.com>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
Matthew Wilcox <willy@infradead.org>,
Matthew Garrett <mjg59@srcf.ucam.org>,
Mark Rutland <mark.rutland@arm.com>,
Michal Hocko <mhocko@suse.com>,
Mike Rapoport <rppt@linux.ibm.com>,
Michael Kerrisk <mtk.manpages@gmail.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Peter Zijlstra <peterz@infradead.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
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Thomas Gleixner <tglx@linutronix.de>,
Tycho Andersen <tycho@tycho.ws>, Will Deacon <will@kernel.org>,
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linux-arm-kernel@lists.infradead.org,
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x86@kernel.org
Subject: Re: [PATCH] memfd_secret: use unsigned int rather than long as syscall flags type
Date: Wed, 31 Mar 2021 14:52:18 -0700 [thread overview]
Message-ID: <20210331215218.GA3437@yury-ThinkPad> (raw)
In-Reply-To: <20210331142345.27532-1-rppt@kernel.org>
On Wed, Mar 31, 2021 at 05:23:45PM +0300, Mike Rapoport wrote:
> From: Mike Rapoport <rppt@linux.ibm.com>
>
> Yuri Norov says:
>
> If parameter size is the same for native and compat ABIs, we may
> wire a syscall made by compat client to native handler. This is
> true for unsigned int, but not true for unsigned long or pointer.
>
> That's why I suggest using unsigned int and so avoid creating compat
> entry point.
>
> Use unsigned int as the type of the flags parameter in memfd_secret()
> system call.
>
> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Yury Norov <yury.norov@gmail.com>
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prev parent reply other threads:[~2021-03-31 21:52 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-31 14:23 [PATCH] memfd_secret: use unsigned int rather than long as syscall flags type Mike Rapoport
2021-03-31 14:53 ` David Hildenbrand
2021-03-31 21:52 ` Yury Norov [this message]
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