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authorNicholas Piggin <npiggin@gmail.com>2021-04-30 08:58:26 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-04-30 21:20:40 +0300
commitbbc180a5adb05ee8053fab7a0c0bd56c5964240e (patch)
tree386f4b3660b5924424a6d36689c3eb3c773588fc /mm/debug_vm_pgtable.c
parent95f0ddf081af3a77433090d9deaf3f76f5648336 (diff)
downloadlinux-bbc180a5adb05ee8053fab7a0c0bd56c5964240e.tar.xz
mm: HUGE_VMAP arch support cleanup
This changes the awkward approach where architectures provide init functions to determine which levels they can provide large mappings for, to one where the arch is queried for each call. This removes code and indirection, and allows constant-folding of dead code for unsupported levels. This also adds a prot argument to the arch query. This is unused currently but could help with some architectures (e.g., some powerpc processors can't map uncacheable memory with large pages). Link: https://lkml.kernel.org/r/20210317062402.533919-7-npiggin@gmail.com Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Reviewed-by: Ding Tianhong <dingtianhong@huawei.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> [arm64] Cc: Will Deacon <will@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Miaohe Lin <linmiaohe@huawei.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Russell King <linux@armlinux.org.uk> Cc: Uladzislau Rezki (Sony) <urezki@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/debug_vm_pgtable.c')
-rw-r--r--mm/debug_vm_pgtable.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/debug_vm_pgtable.c b/mm/debug_vm_pgtable.c
index a9bd6ce1ba02..05efe98a9ac2 100644
--- a/mm/debug_vm_pgtable.c
+++ b/mm/debug_vm_pgtable.c
@@ -247,7 +247,7 @@ static void __init pmd_huge_tests(pmd_t *pmdp, unsigned long pfn, pgprot_t prot)
{
pmd_t pmd;
- if (!arch_ioremap_pmd_supported())
+ if (!arch_vmap_pmd_supported(prot))
return;
pr_debug("Validating PMD huge\n");
@@ -385,7 +385,7 @@ static void __init pud_huge_tests(pud_t *pudp, unsigned long pfn, pgprot_t prot)
{
pud_t pud;
- if (!arch_ioremap_pud_supported())
+ if (!arch_vmap_pud_supported(prot))
return;
pr_debug("Validating PUD huge\n");