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Message-Id: <1436945834-26660-1-git-send-email-mpe@ellerman.id.au> Date: Wed, 15 Jul 2015 17:37:03 +1000 From: Michael Ellerman <mpe@...erman.id.au> To: <linuxppc-dev@...abs.org> Cc: <linux-kernel@...r.kernel.org>, keescook@...omium.org, luto@...capital.net, wad@...omium.org, strosake@...ux.vnet.ibm.com, bogdan.purcareata@...escale.com Subject: [RFC PATCH 01/12] powerpc/kernel: Get pt_regs from r9 before calling do_syscall_trace_enter() To call do_syscall_trace_enter() we need pt_regs in r3, but we don't need to recalculate it based on r1, it's already in r9. Signed-off-by: Michael Ellerman <mpe@...erman.id.au> --- arch/powerpc/kernel/entry_64.S | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 579e0f9a2d57..0796c487d3db 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -243,7 +243,9 @@ syscall_error: /* Traced system call support */ syscall_dotrace: bl save_nvgprs - addi r3,r1,STACK_FRAME_OVERHEAD + + /* Get pt_regs into r3 */ + mr r3, r9 bl do_syscall_trace_enter /* * Restore argument registers possibly just changed. -- 2.1.0 -- 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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