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powerpc/pkeys: Fix calculation of total pkeys.

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Total number of pkeys calculation is off by 1. Fix it.

Fixes: 4fb158f65a ("powerpc: track allocation status of all pkeys")
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>
This commit is contained in:
Ram Pai 2018-07-17 06:51:06 -07:00 committed by Michael Ellerman
parent c76662e825
commit fe6a2804e6
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/mm/pkeys.c
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@ -92,7 +92,7 @@ int pkey_initialize(void)
* arch-neutral code.
*/
pkeys_total = min_t(int, pkeys_total,
(ARCH_VM_PKEY_FLAGS >> VM_PKEY_SHIFT));
((ARCH_VM_PKEY_FLAGS >> VM_PKEY_SHIFT)+1));
if (!pkey_mmu_enabled() || radix_enabled() || !pkeys_total)
static_branch_enable(&pkey_disabled);