[lkml]   [2019]   [Dec]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v5 1/2] IMA: Define workqueue for early boot "key" measurements
On Thu, 2019-12-19 at 08:55 -0800, Lakshmi Ramasubramanian wrote:
> I am not sure if the mutex can be removed.
> In ima_queue_key() we need to test the flag and add the key to the list
> as an atomic operation:
> if (!test_bit())
> insert_key_to_list
> Suppose the if condition is true, but before we could insert the key to
> the list, ima_process_queued_keys() runs and processes queued keys we'll
> add the key to the list and never process it.
> Is there an API in the kernel to test and add an entry to a list
> atomically?

Ok, using test_and_set_bit() and test_bit() only helps, if we can get
rid of the mutex.  I'll queue these patches.



 \ /
  Last update: 2019-12-20 13:54    [W:0.043 / U:14.932 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site