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-rw-r--r--community/cpufrequtils/0003-cpufrequtils-aperf-Fix-MSR-read-on-32-bit.patch35
1 files changed, 35 insertions, 0 deletions
diff --git a/community/cpufrequtils/0003-cpufrequtils-aperf-Fix-MSR-read-on-32-bit.patch b/community/cpufrequtils/0003-cpufrequtils-aperf-Fix-MSR-read-on-32-bit.patch
new file mode 100644
index 0000000000..308e73a5b6
--- /dev/null
+++ b/community/cpufrequtils/0003-cpufrequtils-aperf-Fix-MSR-read-on-32-bit.patch
@@ -0,0 +1,35 @@
+From d4490efed068a552e8b67d52a0726458a224c9a0 Mon Sep 17 00:00:00 2001
+From: Frank Arnold <frank.arnold@amd.com>
+Date: Wed, 8 Dec 2010 17:39:14 +0100
+Subject: [PATCH 3/8] cpufrequtils aperf: Fix MSR read on 32-bit
+
+The cpufreq-aperf command does not work on 32-bit systems. The reason
+for that is a wrong count argument passed to the read() call. Instead
+of the buffer size, the size of the pointer to the buffer is used. On
+64-bit systems this just happened to work, because we need to read an
+8 byte value and a pointer has a size of 8 bytes on 64-bit. On 32-bit
+systems only 4 bytes are read, which then triggers the error path.
+
+Signed-off-by: Frank Arnold <frank.arnold@amd.com>
+Reviewed-by: Thomas Renninger <trenn@suse.de>
+Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
+---
+ utils/aperf.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/utils/aperf.c b/utils/aperf.c
+index 1c64501..6302f5a 100644
+--- a/utils/aperf.c
++++ b/utils/aperf.c
+@@ -100,7 +100,7 @@ static int read_msr(int cpu, unsigned int idx, unsigned long long *val)
+ return -1;
+ if (lseek(fd, idx, SEEK_CUR) == -1)
+ goto err;
+- if (read(fd, val, sizeof val) != sizeof *val)
++ if (read(fd, val, sizeof *val) != sizeof *val)
+ goto err;
+ close(fd);
+ return 0;
+--
+1.7.10
+