From: Robert Richter <rric@kernel.org>
To: Borislav Petkov <bp@alien8.de>
Cc: Ingo Molnar <mingo@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
linux-kernel@vger.kernel.org,
Robert Richter <robert.richter@calxeda.com>
Subject: [PATCH 06/16] perf, persistent: Return -EACCES if mapped buffers must be readonly
Date: Fri, 31 May 2013 10:47:26 +0200 [thread overview]
Message-ID: <1369990056-10310-7-git-send-email-rric@kernel.org> (raw)
In-Reply-To: <1369990056-10310-1-git-send-email-rric@kernel.org>
From: Robert Richter <robert.richter@calxeda.com>
mmap should return EACCES error if fd can not be opened writable.
This error code also helps userland to map buffers readonly on
failure.
Signed-off-by: Robert Richter <robert.richter@calxeda.com>
---
kernel/events/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 0730f36..a9b6470 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -3761,7 +3761,7 @@ static int perf_mmap(struct file *file, struct vm_area_struct *vma)
return -EINVAL;
if (event->attr.persistent && (vma->vm_flags & VM_WRITE))
- return -EINVAL;
+ return -EACCES;
vma_size = vma->vm_end - vma->vm_start;
nr_pages = (vma_size / PAGE_SIZE) - 1;
--
1.8.1.1
next prev parent reply other threads:[~2013-05-31 8:48 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-31 8:47 [PATCH 00/16] perf, persistent: Kernel updates for perf tool integration Robert Richter
2013-05-31 8:47 ` [PATCH 01/16] perf, persistent: Fix build error for no-tracepoints configs Robert Richter
2013-05-31 9:05 ` Borislav Petkov
2013-05-31 8:47 ` [PATCH 02/16] perf, persistent: Fix attr size Robert Richter
2013-05-31 9:05 ` Borislav Petkov
2013-05-31 8:47 ` [PATCH 03/16] perf, persistent: Setting default buffer size to 512k as in perf tools Robert Richter
2013-05-31 9:07 ` Borislav Petkov
2013-05-31 8:47 ` [PATCH 04/16] perf, persistent: Print error code on failure when adding events Robert Richter
2013-05-31 9:10 ` Borislav Petkov
2013-05-31 8:47 ` [PATCH 05/16] perf, persistent: Return resonable error code Robert Richter
2013-05-31 9:11 ` Borislav Petkov
2013-05-31 8:47 ` Robert Richter [this message]
2013-05-31 9:12 ` [PATCH 06/16] perf, persistent: Return -EACCES if mapped buffers must be readonly Borislav Petkov
2013-05-31 8:47 ` [PATCH 07/16] perf, persistent: Rework struct pers_event_desc Robert Richter
2013-05-31 8:47 ` [PATCH 08/16] perf, persistent: Remove rb_put() Robert Richter
2013-05-31 8:47 ` [PATCH 09/16] perf, persistent: Introduce get_persistent_event() Robert Richter
2013-05-31 8:47 ` [PATCH 10/16] perf, persistent: Reworking perf_get_persistent_event_fd() Robert Richter
2013-05-31 8:47 ` [PATCH 11/16] perf, persistent: Protect event lists with mutex Robert Richter
2013-05-31 8:47 ` [PATCH 12/16] perf, persistent: Avoid adding identical events Robert Richter
2013-05-31 8:47 ` [PATCH 13/16] perf, persistent: Implementing a persistent pmu Robert Richter
2013-05-31 8:47 ` [PATCH 14/16] perf, persistent: Name each persistent event Robert Richter
2013-05-31 8:47 ` [PATCH 15/16] perf, persistent: Exposing persistent events using sysfs Robert Richter
2013-05-31 8:47 ` [PATCH 16/16] perf, persistent: Allow multiple users for an event Robert Richter
2013-06-03 13:49 ` Jiri Olsa
2013-06-04 8:20 ` Borislav Petkov
2013-06-04 9:19 ` Jiri Olsa
2013-06-04 9:35 ` Borislav Petkov
2013-06-07 13:47 ` Robert Richter
2013-05-31 9:15 ` [PATCH 00/16] perf, persistent: Kernel updates for perf tool integration Borislav Petkov
2013-05-31 9:32 ` Robert Richter
2013-05-31 12:21 ` Borislav Petkov
2013-06-01 16:15 ` Robert Richter
2013-06-02 7:29 ` Borislav Petkov
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