This allows unsupported levels to be constant folded away, and so p4d_free_pud_page can be removed because it's no longer linked to.
Cc: Thomas Gleixner <t...@linutronix.de> Cc: Ingo Molnar <mi...@redhat.com> Cc: Borislav Petkov <b...@alien8.de> Cc: x...@kernel.org Cc: "H. Peter Anvin" <h...@zytor.com> Signed-off-by: Nicholas Piggin <npig...@gmail.com> --- arch/x86/include/asm/vmalloc.h | 22 +++++++++++++++++++--- arch/x86/mm/ioremap.c | 19 ------------------- arch/x86/mm/pgtable.c | 13 ------------- 3 files changed, 19 insertions(+), 35 deletions(-) diff --git a/arch/x86/include/asm/vmalloc.h b/arch/x86/include/asm/vmalloc.h index 094ea2b565f3..e714b00fc0ca 100644 --- a/arch/x86/include/asm/vmalloc.h +++ b/arch/x86/include/asm/vmalloc.h @@ -1,13 +1,29 @@ #ifndef _ASM_X86_VMALLOC_H #define _ASM_X86_VMALLOC_H +#include <asm/cpufeature.h> #include <asm/page.h> #include <asm/pgtable_areas.h> #ifdef CONFIG_HAVE_ARCH_HUGE_VMAP -bool arch_vmap_p4d_supported(pgprot_t prot); -bool arch_vmap_pud_supported(pgprot_t prot); -bool arch_vmap_pmd_supported(pgprot_t prot); +static inline bool arch_vmap_p4d_supported(pgprot_t prot) +{ + return false; +} + +static inline bool arch_vmap_pud_supported(pgprot_t prot) +{ +#ifdef CONFIG_X86_64 + return boot_cpu_has(X86_FEATURE_GBPAGES); +#else + return false; +#endif +} + +static inline bool arch_vmap_pmd_supported(pgprot_t prot) +{ + return boot_cpu_has(X86_FEATURE_PSE); +} #endif #endif /* _ASM_X86_VMALLOC_H */ diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index 159bfca757b9..1465a22a9bfb 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -481,25 +481,6 @@ void iounmap(volatile void __iomem *addr) } EXPORT_SYMBOL(iounmap); -bool arch_vmap_p4d_supported(pgprot_t prot) -{ - return false; -} - -bool arch_vmap_pud_supported(pgprot_t prot) -{ -#ifdef CONFIG_X86_64 - return boot_cpu_has(X86_FEATURE_GBPAGES); -#else - return false; -#endif -} - -bool arch_vmap_pmd_supported(pgprot_t prot) -{ - return boot_cpu_has(X86_FEATURE_PSE); -} - /* * Convert a physical pointer to a virtual kernel pointer for /dev/mem * access diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c index dfd82f51ba66..801c418ee97d 100644 --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -780,14 +780,6 @@ int pmd_clear_huge(pmd_t *pmd) return 0; } -/* - * Until we support 512GB pages, skip them in the vmap area. - */ -int p4d_free_pud_page(p4d_t *p4d, unsigned long addr) -{ - return 0; -} - #ifdef CONFIG_X86_64 /** * pud_free_pmd_page - Clear pud entry and free pmd page. @@ -859,11 +851,6 @@ int pmd_free_pte_page(pmd_t *pmd, unsigned long addr) #else /* !CONFIG_X86_64 */ -int pud_free_pmd_page(pud_t *pud, unsigned long addr) -{ - return pud_none(*pud); -} - /* * Disable free page handling on x86-PAE. This assures that ioremap() * does not update sync'd pmd entries. See vmalloc_sync_one(). -- 2.23.0