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Mark Rutland fac880c7d0 arm64: fix erroneous warnings in page freeing functions 
In pmd_free_pte_page() and pud_free_pmd_page() we try to warn if they
hit a present non-table entry. In both cases we'll warn for non-present
entries, as the VM_WARN_ON() only checks the entry is not a table entry.

This has been observed to result in warnings when booting a v4.19-rc2
kernel under qemu.

Fix this by bailing out earlier for non-present entries.

Fixes: ec28bb9c9b ("arm64: Implement page table free interfaces")
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
 		2018-09-06 18:01:13 +01:00
..
Makefile
…
cache.S arm64: IPI each CPU after invalidating the I-cache for kernel mappings 2018-07-05 17:24:36 +01:00
context.c treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
copypage.c
…
dma-mapping.c kernel/dma: remove unsupported gfp_mask parameter from dma_alloc_from_contiguous() 2018-08-17 16:20:32 -07:00
dump.c arm64: mm: Use READ_ONCE/WRITE_ONCE when accessing page tables 2018-02-16 18:13:57 +00:00
extable.c
…
fault.c mm: convert return type of handle_mm_fault() caller to vm_fault_t 2018-08-17 16:20:28 -07:00
flush.c arm64: mm: Export __sync_icache_dcache() for xen-privcmd 2018-07-27 13:12:15 +01:00
hugetlbpage.c mm: do not initialize TLB stack vma's with vma_init() 2018-08-01 13:43:38 -07:00
init.c A couple of arm64 fixes 2018-08-17 11:48:04 -07:00
ioremap.c
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kasan_init.c arm64: kasan: avoid pfn_to_nid() before page array is initialized 2018-04-17 16:16:59 +01:00
mmap.c exec: pass stack rlimit into mm layout functions 2018-04-11 10:28:37 -07:00
mmu.c arm64: fix erroneous warnings in page freeing functions 2018-09-06 18:01:13 +01:00
numa.c arm64: numa: separate out updates to percpu nodeid and NUMA node cpumap 2018-07-06 13:18:18 +01:00
pageattr.c arm64: mm: Use READ_ONCE/WRITE_ONCE when accessing page tables 2018-02-16 18:13:57 +00:00
pgd.c
…
physaddr.c
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proc.S arm64: mm: Ensure writes to swapper are ordered wrt subsequent cache maintenance 2018-06-22 17:23:40 +01:00
ptdump_debugfs.c ARM64: dump: Convert to use DEFINE_SHOW_ATTRIBUTE macro 2018-07-02 10:36:37 +01:00