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powerpc/mm: Fix thread_pkey_regs_init()

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thread_pkey_regs_init() initializes the pkey related registers
instead of initializing the fields in the task structures.  Fortunately
those key related registers are re-set to zero when the task
gets scheduled on the cpu. However its good to fix this glaringly
visible error.

Fixes: 06bb53b33804 ("powerpc: store and restore the pkey state across context switches")
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Ram Pai 2018-03-26 19:36:54 -07:00 committed by Michael Ellerman
parent e6e133c47e
commit f208638680
1 changed files with 3 additions and 3 deletions
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6
arch/powerpc/mm/pkeys.c
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@ -308,9 +308,9 @@ void thread_pkey_regs_init(struct thread_struct *thread)
if (static_branch_likely(&pkey_disabled))
return;
write_amr(read_amr() & pkey_amr_uamor_mask);
write_iamr(read_iamr() & pkey_iamr_mask);
write_uamor(read_uamor() & pkey_amr_uamor_mask);
thread->amr = read_amr() & pkey_amr_uamor_mask;
thread->iamr = read_iamr() & pkey_iamr_mask;
thread->uamor = read_uamor() & pkey_amr_uamor_mask;
}
static inline bool pkey_allows_readwrite(int pkey)