x86/tlb: Move __flush_tlb_global() out of line

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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

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This commit is contained in:

Thomas Gleixner 2020-04-21 11:20:33 +02:00 • committed by Borislav Petkov

parent 2faf153bb7

commit cd30d26cf3

4 changed files with 44 additions and 45 deletions

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1

arch/x86/include/asm/paravirt.h

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38

arch/x86/include/asm/tlbflush.h

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9

arch/x86/kernel/paravirt.c

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41

arch/x86/mm/tlb.c

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