diff options
| author | Will Deacon <will.deacon@arm.com> | 2018-12-28 00:37:53 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-12-28 12:11:50 -0800 |
| commit | 8e2d43405b22e98cf5f3730c1829ec1fdbe17ae7 (patch) | |
| tree | c30cf15a54d92a9e56c9c2c1e5fd9455e816b432 /include/asm-generic | |
| parent | 36ddc5a78c878e9b10c323d2fe88b0dae2f487eb (diff) | |
| download | linux-0-day-8e2d43405b22e98cf5f3730c1829ec1fdbe17ae7.tar.gz linux-0-day-8e2d43405b22e98cf5f3730c1829ec1fdbe17ae7.tar.xz | |
lib/ioremap: ensure break-before-make is used for huge p4d mappings
Whilst no architectures actually enable support for huge p4d mappings in
the vmap area, the code that is implemented should be using
break-before-make, as we do for pud and pmd huge entries.
Link: http://lkml.kernel.org/r/1544120495-17438-6-git-send-email-will.deacon@arm.com
Signed-off-by: Will Deacon <will.deacon@arm.com>
Reviewed-by: Toshi Kani <toshi.kani@hpe.com>
Cc: Chintan Pandya <cpandya@codeaurora.org>
Cc: Toshi Kani <toshi.kani@hpe.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/pgtable.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h index a9cac82e9a7ae..05e61e6c843f3 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -1057,6 +1057,7 @@ int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot); int pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot); int pud_clear_huge(pud_t *pud); int pmd_clear_huge(pmd_t *pmd); +int p4d_free_pud_page(p4d_t *p4d, unsigned long addr); int pud_free_pmd_page(pud_t *pud, unsigned long addr); int pmd_free_pte_page(pmd_t *pmd, unsigned long addr); #else /* !CONFIG_HAVE_ARCH_HUGE_VMAP */ @@ -1084,6 +1085,10 @@ static inline int pmd_clear_huge(pmd_t *pmd) { return 0; } +static inline int p4d_free_pud_page(p4d_t *p4d, unsigned long addr) +{ + return 0; +} static inline int pud_free_pmd_page(pud_t *pud, unsigned long addr) { return 0; |