Ram Pai 4a4a5e5d2a powerpc/pkeys: key allocation/deallocation must not change pkey registers ... Key allocation and deallocation has the side effect of programming the UAMOR/AMR/IAMR registers. This is wrong, since its the responsibility of the application and not that of the kernel, to modify the permission on the key. Do not modify the pkey registers at key allocation/deallocation. This patch also fixes a bug where a sys_pkey_free() resets the UAMOR bits of the key, thus making its permissions unmodifiable from user space. Later if the same key gets reallocated from a different thread this thread will no longer be able to change the permissions on the key. Fixes: cf43d3b264 ("powerpc: Enable pkey subsystem") Cc: stable@vger.kernel.org # v4.16+ Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com> Signed-off-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2018-07-24 21:34:08 +10:00
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asm	powerpc/pkeys: key allocation/deallocation must not change pkey registers	2018-07-24 21:34:08 +10:00
uapi/asm	powerpc: Wire up io_pgetevents	2018-06-23 21:43:21 +10:00