From: Qian Cai <cai@redhat.com>
To: Mike Rapoport <rppt@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>
Cc: 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>,
Dan Williams <dan.j.williams@intel.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>, Idan Yaniv <idan.yaniv@ibm.com>,
Ingo Molnar <mingo@redhat.com>,
James Bottomley <jejb@linux.ibm.com>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
Matthew Wilcox <willy@infradead.org>,
Mark Rutland <mark.rutland@arm.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>,
Thomas Gleixner <tglx@linutronix.de>,
Tycho Andersen <tycho@tycho.ws>, Will Deacon <will@kernel.org>,
linux-api@vger.kernel.org, linux-arch@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-fsdevel@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org,
linux-riscv@lists.infradead.org, x86@kernel.org,
Stephen Rothwell <sfr@canb.auug.org.au>,
linux-next@vger.kernel.org
Subject: Re: [PATCH v5 0/5] mm: introduce memfd_secret system call to create "secret" memory areas
Date: Fri, 18 Sep 2020 14:25:15 -0400 [thread overview]
Message-ID: <fdd0240c187f974fccc553acea895f638d5e822a.camel@redhat.com> (raw)
In-Reply-To: <5d97da4d86db258fdc9b20be3c12588089e17da2.camel@redhat.com>
On Thu, 2020-09-17 at 09:27 -0400, Qian Cai wrote:
> On Wed, 2020-09-16 at 10:35 +0300, Mike Rapoport wrote:
> > From: Mike Rapoport <rppt@linux.ibm.com>
> >
> > Hi,
> >
> > This is an implementation of "secret" mappings backed by a file descriptor.
> > I've dropped the boot time reservation patch for now as it is not strictly
> > required for the basic usage and can be easily added later either with or
> > without CMA.
>
> On powerpc: https://gitlab.com/cailca/linux-mm/-/blob/master/powerpc.config
>
> There is a compiling warning from the today's linux-next:
>
> <stdin>:1532:2: warning: #warning syscall memfd_secret not implemented [-Wcpp]
This should silence the warning:
diff --git a/scripts/checksyscalls.sh b/scripts/checksyscalls.sh
index a18b47695f55..b7609958ee36 100755
--- a/scripts/checksyscalls.sh
+++ b/scripts/checksyscalls.sh
@@ -40,6 +40,10 @@ cat << EOF
#define __IGNORE_setrlimit /* setrlimit */
#endif
+#ifndef __ARCH_WANT_MEMFD_SECRET
+#define __IGNORE_memfd_secret
+#endif
+
/* Missing flags argument */
#define __IGNORE_renameat /* renameat2 */
next prev parent reply other threads:[~2020-09-18 18:25 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-16 7:35 [PATCH v5 0/5] mm: introduce memfd_secret system call to create "secret" memory areas Mike Rapoport
2020-09-16 7:35 ` [PATCH v5 1/5] mm: add definition of PMD_PAGE_ORDER Mike Rapoport
2020-09-16 7:35 ` [PATCH v5 2/5] mmap: make mlock_future_check() global Mike Rapoport
2020-09-16 7:35 ` [PATCH v5 3/5] mm: introduce memfd_secret system call to create "secret" memory areas Mike Rapoport
2020-09-16 15:59 ` Randy Dunlap
2020-09-16 7:35 ` [PATCH v5 4/5] arch, mm: wire up memfd_secret system call were relevant Mike Rapoport
2020-09-16 7:35 ` [PATCH v5 5/5] mm: secretmem: use PMD-size pages to amortize direct map fragmentation Mike Rapoport
2020-09-16 23:20 ` [PATCH v5 0/5] mm: introduce memfd_secret system call to create "secret" memory areas Andrew Morton
2020-09-17 5:46 ` Michael Kerrisk (man-pages)
2020-09-17 6:02 ` Mike Rapoport
2020-09-17 6:00 ` Mike Rapoport
2020-09-17 13:27 ` Qian Cai
2020-09-18 18:25 ` Qian Cai [this message]
2020-09-21 8:07 ` Stephen Rothwell
-- strict thread matches above, loose matches on Subject: below --
2020-09-16 7:28 Mike Rapoport
2020-09-16 18:49 ` Andy Lutomirski
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