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| author | Borislav Petkov <bp@suse.de> | 2016-06-01 11:36:13 +0200 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2016-06-07 20:11:10 -0700 |
| commit | 7be4881846cfa67f968eaf5b7b50d9623a652afb (patch) | |
| tree | 7c3df09b338f35577e58c44421e1d2e20795816a /mm/kasan | |
| parent | af8c34ce6ae32addda3788d54a7e340cad22516b (diff) | |
| download | linux-7be4881846cfa67f968eaf5b7b50d9623a652afb.tar.gz linux-7be4881846cfa67f968eaf5b7b50d9623a652afb.tar.bz2 linux-7be4881846cfa67f968eaf5b7b50d9623a652afb.zip | |
hwmon: (fam15h_power) Disable preemption when reading registers
We need to read a bunch of registers on each compute unit and possibly
on the current CPU too. Disable preemption around it. Otherwise, you
get:
BUG: using smp_processor_id() in preemptible [00000000] code: systemd-udevd/327
caller is read_registers+0x6a/0x110 [fam15h_power]
CPU: 3 PID: 327 Comm: systemd-udevd Not tainted 4.7.0-rc1+ #4
Hardware name: HP HP EliteBook 745 G3/807E, BIOS N73 Ver. 01.08 01/28/2016
...
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Rui Huang <ray.huang@amd.com>
Cc: Sherry Hurwitz <sherry.hurwitz@amd.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Acked-by: Huang Rui <ray.huang@amd.com>
Tested-by: Huang Rui <ray.huang@amd.com>
Fixes: fa7943449943 ("hwmon: (fam15h_power) Add compute unit accumulated power")
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'mm/kasan')
0 files changed, 0 insertions, 0 deletions