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Subject[tip: x86/mm] x86/tlb: Move cr4_set_bits_and_update_boot() to the usage site
The following commit has been merged into the x86/mm branch of tip:

Commit-ID: 96f59fe291d2cdc0fcb6f5f2f4b7c9cea9533fc3
Gitweb: https://git.kernel.org/tip/96f59fe291d2cdc0fcb6f5f2f4b7c9cea9533fc3
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Tue, 21 Apr 2020 11:20:39 +02:00
Committer: Borislav Petkov <bp@suse.de>
CommitterDate: Sun, 26 Apr 2020 18:39:48 +02:00

x86/tlb: Move cr4_set_bits_and_update_boot() to the usage site

No point in having this exposed.

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/20200421092559.940978251@linutronix.de
---
arch/x86/include/asm/tlbflush.h | 14 --------------
arch/x86/mm/init.c | 13 +++++++++++++
2 files changed, 13 insertions(+), 14 deletions(-)

diff --git a/arch/x86/include/asm/tlbflush.h b/arch/x86/include/asm/tlbflush.h
index c22fc72..917deea 100644
--- a/arch/x86/include/asm/tlbflush.h
+++ b/arch/x86/include/asm/tlbflush.h
@@ -322,23 +322,9 @@ static inline void cr4_clear_bits(unsigned long mask)
local_irq_restore(flags);
}

-/*
- * Save some of cr4 feature set we're using (e.g. Pentium 4MB
- * enable and PPro Global page enable), so that any CPU's that boot
- * up after us can get the correct flags. This should only be used
- * during boot on the boot cpu.
- */
extern unsigned long mmu_cr4_features;
extern u32 *trampoline_cr4_features;

-static inline void cr4_set_bits_and_update_boot(unsigned long mask)
-{
- mmu_cr4_features |= mask;
- if (trampoline_cr4_features)
- *trampoline_cr4_features = mmu_cr4_features;
- cr4_set_bits(mask);
-}
-
extern void initialize_tlbstate_and_flush(void);

#define TLB_FLUSH_ALL -1UL
diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
index 71720dd..d37e816 100644
--- a/arch/x86/mm/init.c
+++ b/arch/x86/mm/init.c
@@ -194,6 +194,19 @@ struct map_range {

static int page_size_mask;

+/*
+ * Save some of cr4 feature set we're using (e.g. Pentium 4MB
+ * enable and PPro Global page enable), so that any CPU's that boot
+ * up after us can get the correct flags. Invoked on the boot CPU.
+ */
+static inline void cr4_set_bits_and_update_boot(unsigned long mask)
+{
+ mmu_cr4_features |= mask;
+ if (trampoline_cr4_features)
+ *trampoline_cr4_features = mmu_cr4_features;
+ cr4_set_bits(mask);
+}
+
static void __init probe_page_size_mask(void)
{
/*
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