diff options
| author | Ram Pai <linuxram@us.ibm.com> | 2018-07-17 06:51:05 -0700 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-07-24 21:34:47 +1000 |
| commit | c76662e825f507b98938dc3bb141c4505bd4968c (patch) | |
| tree | de449519750e13cea226b0b61af622576e28fbff /arch | |
| parent | 4a4a5e5d2aadc793be95024f454cf511d115b62d (diff) | |
powerpc/pkeys: Save the pkey registers before fork
When a thread forks the contents of AMR, IAMR, UAMOR registers in the
newly forked thread are not inherited.
Save the registers before forking, for content of those
registers to be automatically copied into the new thread.
Fixes: cf43d3b26452 ("powerpc: Enable pkey subsystem")
Cc: stable@vger.kernel.org # v4.16+
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/kernel/process.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 27f0caee55ea..eca92aac2e17 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -583,6 +583,7 @@ static void save_all(struct task_struct *tsk) __giveup_spe(tsk); msr_check_and_clear(msr_all_available); + thread_pkey_regs_save(&tsk->thread); } void flush_all_to_thread(struct task_struct *tsk) |