Re: [PATCH 3/10] kdump: export per cpu crash notes pointer through sysfs

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Vivek Goyal <[email protected]> wrote:
>
> +	/*
> +	 * Might be reading other cpu's data based on which cpu read thread
> +	 * has been scheduled. But cpu data (memory) is allocated once during
> +	 * boot up and this data does not change there after. Hence this
> +	 * operation should be safe. No locking required.
> +	 */
> +	get_cpu();
> +	addr = __pa(per_cpu_ptr(crash_notes, cpunum));
> +	rc = sprintf(buf, "%Lx\n", addr);
> +	put_cpu();

I don't think the get_cpu() and put_cpu() are needed here?
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux