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由 Borislav Petkov 提交于
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: NThomas Gleixner <tglx@linutronix.de> Signed-off-by: NBorislav 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: NHuang Rui <ray.huang@amd.com> Tested-by: NHuang Rui <ray.huang@amd.com> Fixes: fa794344 ("hwmon: (fam15h_power) Add compute unit accumulated power") Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
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