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(parent: 81fadff) | patch
parisc: Fix extraction of hash lock bits in syscall.S
authorJohn David Anglin <dave.anglin@bell.net>
Fri, 19 Nov 2021 21:18:47 +0000 (22:18 +0100)
committerHelge Deller <deller@gmx.de>
Mon, 22 Nov 2021 06:37:31 +0000 (07:37 +0100)
commit782df9ff75ed4c27b78c19f0f6331eb71b097d24
treec60a4592b2f2ae3cb7f4d11cb7877a485db517ectree | snapshot
parent81fadffdef475be459f29d8401c87dfe36fd317ccommit | diff
parisc: Fix extraction of hash lock bits in syscall.S

The extru instruction leaves the most significant 32 bits of the target
register in an undefined state on PA 2.0 systems. If any of these bits
are nonzero, this will break the calculation of the lock pointer.

Fix by using extrd,u instruction via extru_safe macro on 64-bit kernels.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
arch/parisc/kernel/syscall.S diff | blob | history
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