Re: [v2,2/2] powerpc: Do not assign thread.tidr if already assigned
From: Michael Ellerman <hidden>
Date: 2017-11-29 12:06:44
On Fri, 2017-11-24 at 08:33:38 UTC, Vaibhav Jain wrote:
If set_thread_tidr() is called twice for same task_struct then it will
allocate a new tidr value to it leaving the previous value still
dangling in the vas_thread_ida table.
To fix this the patch changes set_thread_tidr() to check if a tidr
value is already assigned to the task_struct and if yes then returns
the existing value from function instead of allocating a new one.
Fixes: ec233ede4c86("powerpc: Add support for setting SPRN_TIDR")
Signed-off-by: Vaibhav Jain <redacted>
Reviewed-by: Andrew Donnellan <redacted>Applied to powerpc fixes, thanks. https://git.kernel.org/powerpc/c/7e4d4233260be0611c7fbdb2730c12 cheers