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Subject[PATCH 4/5] x86/mm/kaiser: Remove superfluous SWITCH_TO_KERNEL
We never use this code-path with KAISER enabled.

Fixes: ("Prepare the x86/entry assembly code for entry/exit CR3 switching")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
arch/x86/entry/entry_64.S | 8 --------
1 file changed, 8 deletions(-)

--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -201,14 +201,6 @@ ENTRY(entry_SYSCALL_64)

swapgs
movq %rsp, PER_CPU_VAR(rsp_scratch)
-
- /*
- * The kernel CR3 is needed to map the process stack, but we
- * need a scratch register to be able to load CR3. %rsp is
- * clobberable right now, so use it as a scratch register.
- * %rsp will look crazy here for a couple instructions.
- */
- SWITCH_TO_KERNEL_CR3 scratch_reg=%rsp
movq PER_CPU_VAR(cpu_current_top_of_stack), %rsp

/* Construct struct pt_regs on stack */

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