From 1b2411c283e8e178b1c57d07f7fe082442a0927b Mon Sep 17 00:00:00 2001 From: Richard Weinberger Date: Mon, 26 Oct 2015 10:38:27 +0100 Subject: [PATCH] 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 --- 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 a212445358d6..ba914b3b8cc4 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 -- 2.39.5