• Mark Rutland's avatar
    arm64: entry32: remove pointless register assignment · ad2daa85
    Mark Rutland authored
    We currently set x27 in compat_sys_sigreturn_wrapper and
    compat_sys_rt_sigreturn_wrapper, similarly to what we do with r8/why on
    32-bit ARM, in an attempt to prevent sigreturns from being restarted.
    However, on arm64 we have always used pt_regs::syscallno for syscall
    restarting (for both native and compat tasks), and x27 is never
    inspected again before being overwritten in kernel_exit.
    This patch removes the pointless register assignments.
    Signed-off-by: default avatarMark Rutland <mark.rutland@arm.com>
    Cc: Will Deacon <will.deacon@arm.com>
    Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
entry32.S 2.98 KB