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authorThomas Gleixner <tglx@linutronix.de>2020-04-21 11:20:33 +0200
committerBorislav Petkov <bp@suse.de>2020-04-26 11:00:27 +0200
commitcd30d26cf307b45159cd629d60b989e582372afe (patch)
tree6b6642facf33be2c093b9da36d0409a2699ad6a3 /arch/x86/kernel/paravirt.c
parent2faf153bb7346b7dfc895f916edf93a86297ec0a (diff)
x86/tlb: Move __flush_tlb_global() out of line
cpu_tlbstate is exported because various TLB-related functions need access to it, but cpu_tlbstate is sensitive information which should only be accessed by well-contained kernel functions and not be directly exposed to modules. As a second step, move __flush_tlb_global() out of line and hide the native function. The latter can be static when CONFIG_PARAVIRT is disabled. Consolidate the namespace while at it and remove the pointless extra wrapper in the paravirt code. No functional change. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20200421092559.336916818@linutronix.de
Diffstat (limited to 'arch/x86/kernel/paravirt.c')
-rw-r--r--arch/x86/kernel/paravirt.c9
1 files changed, 0 insertions, 9 deletions
diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index 4cb3d822ea09..6094b007979c 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -160,15 +160,6 @@ unsigned paravirt_patch_insns(void *insn_buff, unsigned len,
return insn_len;
}
-/*
- * Global pages have to be flushed a bit differently. Not a real
- * performance problem because this does not happen often.
- */
-static void native_flush_tlb_global(void)
-{
- __native_flush_tlb_global();
-}
-
static void native_flush_tlb_one_user(unsigned long addr)
{
__native_flush_tlb_one_user(addr);