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ARM: 9197/1: spectre-bhb: fix loop8 sequence for Thumb2
authorArd Biesheuvel <ardb@kernel.org>
Wed, 20 Apr 2022 08:46:17 +0000 (09:46 +0100)
committerRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
Wed, 18 May 2022 10:38:47 +0000 (11:38 +0100)
commite0e949cd829171b87327cba8fdf0b8f984432a8f
tree00584b7790f30d7c396b42c5e34ff0fbfa071703tree | snapshot
parent1fa5f242d7b6148b23306600e7ad3b0c3bacea85commit | diff
ARM: 9197/1: spectre-bhb: fix loop8 sequence for Thumb2

In Thumb2, 'b . + 4' produces a branch instruction that uses a narrow
encoding, and so it does not jump to the following instruction as
expected. So use W(b) instead.

Fixes: 07cd9e9e75d8 ("ARM: fix Thumb2 regression with Spectre BHB")
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
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