tree 93beb08eb9a78f81c80866baf25f7472df35b955
parent edc39c9b4589a4ce9a69273b5a27a1459c3423d4
author Peter Zijlstra <peterz@infradead.org> 1516185727 +0100
committer Thomas Gleixner <tglx@linutronix.de> 1521539882 +0100

x86: Force asm-goto

We want to start using asm-goto to guarantee the absence of dynamic
branches (and thus speculation).

A primary prerequisite for this is of course that the compiler
supports asm-goto. This effecively lifts the minimum GCC version to
build an x86 kernel to gcc-4.5.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: torvalds@linux-foundation.org
Link: https://lkml.kernel.org/r/20180319201327.GJ4043@hirez.programming.kicks-ass.net