Messages in this thread Patch in this message | | | From | Jungseok Lee <> | Subject | [RFC PATCH 1/3] arm64: entry: Remove unnecessary calculation for S_SP in EL1h | Date | Fri, 4 Sep 2015 14:23:05 +0000 |
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Under EL1h, S_SP data is not seen in kernel_exit. Thus, x21 calculation is not needed in kernel_entry. Currently, S_SP information is vaild only when sp_el0 is used.
Signed-off-by: Jungseok Lee <jungseoklee85@gmail.com> --- arch/arm64/kernel/entry.S | 2 -- 1 file changed, 2 deletions(-)
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index e163518..d23ca0d 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -91,8 +91,6 @@ get_thread_info tsk // Ensure MDSCR_EL1.SS is clear, ldr x19, [tsk, #TI_FLAGS] // since we can unmask debug disable_step_tsk x19, x20 // exceptions when scheduling. - .else - add x21, sp, #S_FRAME_SIZE .endif mrs x22, elr_el1 mrs x23, spsr_el1 -- 1.9.1
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