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Date: Mon, 26 Oct 2015 10:48:16 +0100 From: Richard Weinberger <richard@....at> To: user-mode-linux-devel@...ts.sourceforge.net Cc: linux-kernel@...r.kernel.org, Richard Weinberger <richard@....at> Subject: [PATCH 6/7] um: Simplify STUB_DATA loading As long STUB_DATA fits into 32bits we can use a plain mov. If it will grow at some point in future we will switch to movabsq. In any case the code is smaller and more easy to read than the current one Signed-off-by: Richard Weinberger <richard@....at> --- arch/x86/um/stub_64.S | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/arch/x86/um/stub_64.S b/arch/x86/um/stub_64.S index a212445..ba914b3 100644 --- a/arch/x86/um/stub_64.S +++ b/arch/x86/um/stub_64.S @@ -3,10 +3,7 @@ .section .__syscall_stub, "ax" .globl batch_syscall_stub batch_syscall_stub: - mov $(STUB_DATA >> 32), %rbx - sal $32, %rbx - mov $(STUB_DATA & 0xffffffff), %rax - or %rax, %rbx + mov $(STUB_DATA), %rbx /* load pointer to first operation */ mov %rbx, %rsp add $0x10, %rsp -- 1.8.4.5 -- 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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