From: David Howells <dhowells@redhat.com>
To: Eugeniu Rosca <erosca@de.adit-jv.com>
Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, raven@themaw.net,
linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org,
linux-block@vger.kernel.org, keyrings@vger.kernel.org,
linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org,
Eugeniu Rosca <roscaeugeniu@gmail.com>
Subject: Re: [PATCH 10/10] Add sample notification program [ver #3]
Date: Thu, 06 Jun 2019 23:52:50 +0100 [thread overview]
Message-ID: <31575.1559861570@warthog.procyon.org.uk> (raw)
In-Reply-To: <20190606212140.GA25664@vmlxhi-102.adit-jv.com>
Eugeniu Rosca <erosca@de.adit-jv.com> wrote:
> How about arm64? Do you intend to enable cross-compilation?
There's no guarantee that a cross-compiler can actually build userspace apps,
though I haven't intended to encode anything against that in the Makefile.
> > + asm ("lfence" : : : "memory" );
> [..]
> > + asm("mfence" ::: "memory");
>
> FWIW, trying to cross-compile it returned:
>
> aarch64-linux-gnu-gcc -I../../usr/include -I../../include watch_test.c -o watch_test
> /tmp/ccDXYynm.s: Assembler messages:
> /tmp/ccDXYynm.s:471: Error: unknown mnemonic `lfence' -- `lfence'
> /tmp/ccDXYynm.s:568: Error: unknown mnemonic `mfence' -- `mfence'
Yeah. I need to use C-standard __atomic_* stuff.
David
WARNING: multiple messages have this Message-ID (diff)
From: David Howells <dhowells@redhat.com>
To: Eugeniu Rosca <erosca@de.adit-jv.com>
Cc: dhowells@redhat.com, viro@zeniv.linux.org.uk, raven@themaw.net,
linux-fsdevel@vger.kernel.org, linux-api@vger.kernel.org,
linux-block@vger.kernel.org, keyrings@vger.kernel.org,
linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org,
Eugeniu Rosca <roscaeugeniu@gmail.com>
Subject: Re: [PATCH 10/10] Add sample notification program [ver #3]
Date: Thu, 06 Jun 2019 22:52:50 +0000 [thread overview]
Message-ID: <31575.1559861570@warthog.procyon.org.uk> (raw)
In-Reply-To: <20190606212140.GA25664@vmlxhi-102.adit-jv.com>
Eugeniu Rosca <erosca@de.adit-jv.com> wrote:
> How about arm64? Do you intend to enable cross-compilation?
There's no guarantee that a cross-compiler can actually build userspace apps,
though I haven't intended to encode anything against that in the Makefile.
> > + asm ("lfence" : : : "memory" );
> [..]
> > + asm("mfence" ::: "memory");
>
> FWIW, trying to cross-compile it returned:
>
> aarch64-linux-gnu-gcc -I../../usr/include -I../../include watch_test.c -o watch_test
> /tmp/ccDXYynm.s: Assembler messages:
> /tmp/ccDXYynm.s:471: Error: unknown mnemonic `lfence' -- `lfence'
> /tmp/ccDXYynm.s:568: Error: unknown mnemonic `mfence' -- `mfence'
Yeah. I need to use C-standard __atomic_* stuff.
David
next prev parent reply other threads:[~2019-06-06 22:52 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-06 9:41 [RFC][PATCH 00/10] Mount, FS, Block and Keyrings notifications [ver #3] David Howells
2019-06-06 9:41 ` David Howells
2019-06-06 9:42 ` [PATCH 01/10] security: Override creds in __fput() with last fputter's creds " David Howells
2019-06-06 9:42 ` David Howells
2019-06-06 9:42 ` David Howells
2019-06-06 14:57 ` Andy Lutomirski
2019-06-06 14:57 ` Andy Lutomirski
2019-06-06 15:06 ` David Howells
2019-06-06 15:06 ` David Howells
2019-06-06 17:18 ` Andy Lutomirski
2019-06-06 17:18 ` Andy Lutomirski
2019-06-06 19:09 ` Casey Schaufler
2019-06-06 19:09 ` Casey Schaufler
2019-06-06 19:34 ` Andy Lutomirski
2019-06-06 19:34 ` Andy Lutomirski
2019-06-06 9:42 ` [PATCH 02/10] General notification queue with user mmap()'able ring buffer " David Howells
2019-06-06 9:42 ` David Howells
2019-06-06 9:42 ` [PATCH 03/10] keys: Add a notification facility " David Howells
2019-06-06 9:42 ` David Howells
2019-06-06 9:42 ` [PATCH 04/10] vfs: Add a mount-notification " David Howells
2019-06-06 9:42 ` David Howells
2019-06-06 9:42 ` [PATCH 05/10] vfs: Add superblock notifications " David Howells
2019-06-06 9:42 ` David Howells
2019-06-06 9:42 ` [PATCH 06/10] fsinfo: Export superblock notification counter " David Howells
2019-06-06 9:42 ` David Howells
2019-06-06 9:43 ` [PATCH 07/10] Add a general, global device notification watch list " David Howells
2019-06-06 9:43 ` David Howells
2019-06-06 9:43 ` [PATCH 08/10] block: Add block layer notifications " David Howells
2019-06-06 9:43 ` David Howells
2019-06-06 9:43 ` [PATCH 09/10] usb: Add USB subsystem " David Howells
2019-06-06 9:43 ` David Howells
2019-06-06 14:24 ` Alan Stern
2019-06-06 14:24 ` Alan Stern
2019-06-06 14:24 ` Alan Stern
2019-06-06 14:33 ` Greg Kroah-Hartman
2019-06-06 14:33 ` Greg Kroah-Hartman
2019-06-06 14:55 ` Alan Stern
2019-06-06 14:55 ` Alan Stern
2019-06-06 14:55 ` Alan Stern
2019-06-06 15:31 ` Greg Kroah-Hartman
2019-06-06 15:31 ` Greg Kroah-Hartman
2019-06-07 6:40 ` Felipe Balbi
2019-06-07 6:40 ` Felipe Balbi
2019-06-07 14:01 ` Alan Stern
2019-06-07 14:01 ` Alan Stern
2019-06-07 14:01 ` Alan Stern
2019-06-11 6:28 ` Felipe Balbi
2019-06-11 6:28 ` Felipe Balbi
2019-06-11 13:53 ` Alan Stern
2019-06-11 13:53 ` Alan Stern
2019-06-11 13:53 ` Alan Stern
2019-06-12 6:58 ` Felipe Balbi
2019-06-12 6:58 ` Felipe Balbi
2019-06-06 9:43 ` [PATCH 10/10] Add sample notification program " David Howells
2019-06-06 9:43 ` David Howells
2019-06-06 21:21 ` Eugeniu Rosca
2019-06-06 21:21 ` Eugeniu Rosca
2019-06-06 21:21 ` Eugeniu Rosca
2019-06-06 22:52 ` David Howells [this message]
2019-06-06 22:52 ` David Howells
2019-06-07 14:37 ` David Howells
2019-06-07 14:37 ` David Howells
2019-06-06 12:32 ` [RFC][PATCH 00/10] Mount, FS, Block and Keyrings notifications " Stephen Smalley
2019-06-06 12:32 ` Stephen Smalley
2019-06-06 13:16 ` David Howells
2019-06-06 13:16 ` David Howells
2019-06-06 14:05 ` Stephen Smalley
2019-06-06 14:05 ` Stephen Smalley
2019-06-06 16:43 ` Casey Schaufler
2019-06-06 16:43 ` Casey Schaufler
2019-06-06 17:11 ` Andy Lutomirski
2019-06-06 17:11 ` Andy Lutomirski
2019-06-06 18:33 ` Casey Schaufler
2019-06-06 18:33 ` Casey Schaufler
2019-06-06 18:51 ` Andy Lutomirski
2019-06-06 18:51 ` Andy Lutomirski
2019-06-06 17:16 ` Stephen Smalley
2019-06-06 17:16 ` Stephen Smalley
2019-06-06 18:56 ` Casey Schaufler
2019-06-06 18:56 ` Casey Schaufler
2019-06-06 19:54 ` Andy Lutomirski
2019-06-06 19:54 ` Andy Lutomirski
2019-06-06 21:17 ` David Howells
2019-06-06 21:17 ` David Howells
2019-06-06 21:54 ` Andy Lutomirski
2019-06-06 21:54 ` Andy Lutomirski
2019-06-06 22:38 ` David Howells
2019-06-06 22:38 ` David Howells
2019-06-06 22:42 ` Andy Lutomirski
2019-06-06 22:42 ` Andy Lutomirski
2019-06-06 22:50 ` David Howells
2019-06-06 22:50 ` David Howells
2019-06-06 14:34 ` Christian Brauner
2019-06-06 14:34 ` Christian Brauner
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