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Date: Fri, 4 Sep 2015 14:23:05 +0000 From: Jungseok Lee <jungseoklee85@...il.com> To: catalin.marinas@....com, will.deacon@....com, linux-arm-kernel@...ts.infradead.org Cc: linux-kernel@...r.kernel.org Subject: [RFC PATCH 1/3] arm64: entry: Remove unnecessary calculation for S_SP in EL1h 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@...il.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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