diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2021-04-30 08:58:39 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-30 21:20:40 +0300 |
| commit | 6f680e70b6ff58c9670769534196800233685d55 (patch) | |
| tree | 3da6fe94945be6dcff931144e7868fc415649399 /include | |
| parent | 97dc2a1548ab0dc320ce3618b73b3f9dc732b6ee (diff) | |
| download | linux-6f680e70b6ff58c9670769534196800233685d55.tar.xz | |
mm/vmalloc: provide fallback arch huge vmap support functions
If an architecture doesn't support a particular page table level as a huge
vmap page size then allow it to skip defining the support query function.
Link: https://lkml.kernel.org/r/20210317062402.533919-11-npiggin@gmail.com
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Suggested-by: Christoph Hellwig <hch@lst.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Ding Tianhong <dingtianhong@huawei.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/vmalloc.h | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 358c51c702c0..eb5630be6783 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -78,10 +78,26 @@ struct vmap_area { }; }; -#ifndef CONFIG_HAVE_ARCH_HUGE_VMAP -static inline bool arch_vmap_p4d_supported(pgprot_t prot) { return false; } -static inline bool arch_vmap_pud_supported(pgprot_t prot) { return false; } -static inline bool arch_vmap_pmd_supported(pgprot_t prot) { return false; } +/* archs that select HAVE_ARCH_HUGE_VMAP should override one or more of these */ +#ifndef arch_vmap_p4d_supported +static inline bool arch_vmap_p4d_supported(pgprot_t prot) +{ + return false; +} +#endif + +#ifndef arch_vmap_pud_supported +static inline bool arch_vmap_pud_supported(pgprot_t prot) +{ + return false; +} +#endif + +#ifndef arch_vmap_pmd_supported +static inline bool arch_vmap_pmd_supported(pgprot_t prot) +{ + return false; +} #endif /* |