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x86/mm: Remove unused current_untag_mask()

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e0bddc19ba ("x86/mm: Reduce untagged_addr() overhead for systems without LAM")

removed its only usage site so drop it.

Move the tlbstate_untag_mask up in the header and drop the ugly
ifdeffery as the unused declaration should be properly discarded.

Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Link: https://lore.kernel.org/r/20230614174148.5439-1-bp@alien8.de
This commit is contained in:
Borislav Petkov (AMD)
2023-06-14 19:41:48 +02:00
parent 7e980867ce
commit 013fdeb07a
1 changed files with 2 additions and 9 deletions
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11
arch/x86/include/asm/tlbflush.h
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@@ -14,6 +14,8 @@
#include <asm/processor-flags.h> #include <asm/processor-flags.h>
#include <asm/pgtable.h> #include <asm/pgtable.h>
DECLARE_PER_CPU(u64, tlbstate_untag_mask);
void __flush_tlb_all(void); void __flush_tlb_all(void);
#define TLB_FLUSH_ALL -1UL #define TLB_FLUSH_ALL -1UL
@@ -54,15 +56,6 @@ static inline void cr4_clear_bits(unsigned long mask)
local_irq_restore(flags); local_irq_restore(flags);
} }
#ifdef CONFIG_ADDRESS_MASKING
DECLARE_PER_CPU(u64, tlbstate_untag_mask);
static inline u64 current_untag_mask(void)
{
return this_cpu_read(tlbstate_untag_mask);
}
#endif
#ifndef MODULE #ifndef MODULE
/* /*
* 6 because 6 should be plenty and struct tlb_state will fit in two cache * 6 because 6 should be plenty and struct tlb_state will fit in two cache