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msm: scm: Fix improper register assignment
Assign the registers used in the inline assembly immediately before the inline assembly block. This ensures the compiler doesn't optimize away dead register assignments when it shouldn't. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Acked-by: Nicolas Pitre <nico@fluxnic.net> Signed-off-by: David Brown <davidb@codeaurora.org>
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@ -264,13 +264,16 @@ u32 scm_get_version(void)
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{
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int context_id;
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static u32 version = -1;
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register u32 r0 asm("r0") = 0x1 << 8;
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register u32 r1 asm("r1") = (u32)&context_id;
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register u32 r0 asm("r0");
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register u32 r1 asm("r1");
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if (version != -1)
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return version;
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mutex_lock(&scm_lock);
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r0 = 0x1 << 8;
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r1 = (u32)&context_id;
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asm volatile(
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__asmeq("%0", "r1")
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__asmeq("%1", "r0")
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