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3d8f761531
The implementation of readahead(2) syscall is identical to that of
fadvise64(POSIX_FADV_WILLNEED) with a few exceptions:
1. readahead(2) returns -EINVAL for !mapping->a_ops and fadvise64()
ignores the request and returns 0.
2. fadvise64() checks for integer overflow corner case
3. fadvise64() calls the optional filesystem fadvise() file operation
Unite the two implementations by calling vfs_fadvise() from readahead(2)
syscall. Check the !mapping->a_ops in readahead(2) syscall to preserve
documented syscall ABI behaviour.
Suggested-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: d1d04ef857 ("ovl: stack file ops")
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
108 lines
3.6 KiB
Makefile
108 lines
3.6 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
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#
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# Makefile for the linux memory manager.
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#
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KASAN_SANITIZE_slab_common.o := n
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KASAN_SANITIZE_slab.o := n
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KASAN_SANITIZE_slub.o := n
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# These files are disabled because they produce non-interesting and/or
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# flaky coverage that is not a function of syscall inputs. E.g. slab is out of
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# free pages, or a task is migrated between nodes.
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KCOV_INSTRUMENT_slab_common.o := n
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KCOV_INSTRUMENT_slob.o := n
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KCOV_INSTRUMENT_slab.o := n
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KCOV_INSTRUMENT_slub.o := n
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KCOV_INSTRUMENT_page_alloc.o := n
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KCOV_INSTRUMENT_debug-pagealloc.o := n
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KCOV_INSTRUMENT_kmemleak.o := n
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KCOV_INSTRUMENT_memcontrol.o := n
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KCOV_INSTRUMENT_mmzone.o := n
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KCOV_INSTRUMENT_vmstat.o := n
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mmu-y := nommu.o
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mmu-$(CONFIG_MMU) := gup.o highmem.o memory.o mincore.o \
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mlock.o mmap.o mprotect.o mremap.o msync.o \
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page_vma_mapped.o pagewalk.o pgtable-generic.o \
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rmap.o vmalloc.o
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ifdef CONFIG_CROSS_MEMORY_ATTACH
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mmu-$(CONFIG_MMU) += process_vm_access.o
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endif
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obj-y := filemap.o mempool.o oom_kill.o fadvise.o \
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maccess.o page_alloc.o page-writeback.o \
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readahead.o swap.o truncate.o vmscan.o shmem.o \
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util.o mmzone.o vmstat.o backing-dev.o \
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mm_init.o mmu_context.o percpu.o slab_common.o \
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compaction.o vmacache.o \
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interval_tree.o list_lru.o workingset.o \
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debug.o $(mmu-y)
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obj-y += init-mm.o
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ifdef CONFIG_NO_BOOTMEM
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obj-y += nobootmem.o
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else
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obj-y += bootmem.o
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endif
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ifdef CONFIG_MMU
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obj-$(CONFIG_ADVISE_SYSCALLS) += madvise.o
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endif
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obj-$(CONFIG_HAVE_MEMBLOCK) += memblock.o
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obj-$(CONFIG_SWAP) += page_io.o swap_state.o swapfile.o swap_slots.o
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obj-$(CONFIG_FRONTSWAP) += frontswap.o
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obj-$(CONFIG_ZSWAP) += zswap.o
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obj-$(CONFIG_HAS_DMA) += dmapool.o
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obj-$(CONFIG_HUGETLBFS) += hugetlb.o
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obj-$(CONFIG_NUMA) += mempolicy.o
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obj-$(CONFIG_SPARSEMEM) += sparse.o
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obj-$(CONFIG_SPARSEMEM_VMEMMAP) += sparse-vmemmap.o
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obj-$(CONFIG_SLOB) += slob.o
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obj-$(CONFIG_MMU_NOTIFIER) += mmu_notifier.o
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obj-$(CONFIG_KSM) += ksm.o
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obj-$(CONFIG_PAGE_POISONING) += page_poison.o
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obj-$(CONFIG_SLAB) += slab.o
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obj-$(CONFIG_SLUB) += slub.o
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obj-$(CONFIG_KASAN) += kasan/
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obj-$(CONFIG_FAILSLAB) += failslab.o
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obj-$(CONFIG_MEMORY_HOTPLUG) += memory_hotplug.o
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obj-$(CONFIG_MEMTEST) += memtest.o
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obj-$(CONFIG_MIGRATION) += migrate.o
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obj-$(CONFIG_QUICKLIST) += quicklist.o
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obj-$(CONFIG_TRANSPARENT_HUGEPAGE) += huge_memory.o khugepaged.o
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obj-$(CONFIG_PAGE_COUNTER) += page_counter.o
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obj-$(CONFIG_MEMCG) += memcontrol.o vmpressure.o
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obj-$(CONFIG_MEMCG_SWAP) += swap_cgroup.o
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obj-$(CONFIG_CGROUP_HUGETLB) += hugetlb_cgroup.o
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obj-$(CONFIG_GUP_BENCHMARK) += gup_benchmark.o
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obj-$(CONFIG_MEMORY_FAILURE) += memory-failure.o
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obj-$(CONFIG_HWPOISON_INJECT) += hwpoison-inject.o
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obj-$(CONFIG_DEBUG_KMEMLEAK) += kmemleak.o
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obj-$(CONFIG_DEBUG_KMEMLEAK_TEST) += kmemleak-test.o
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obj-$(CONFIG_DEBUG_RODATA_TEST) += rodata_test.o
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obj-$(CONFIG_PAGE_OWNER) += page_owner.o
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obj-$(CONFIG_CLEANCACHE) += cleancache.o
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obj-$(CONFIG_MEMORY_ISOLATION) += page_isolation.o
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obj-$(CONFIG_ZPOOL) += zpool.o
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obj-$(CONFIG_ZBUD) += zbud.o
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obj-$(CONFIG_ZSMALLOC) += zsmalloc.o
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obj-$(CONFIG_Z3FOLD) += z3fold.o
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obj-$(CONFIG_GENERIC_EARLY_IOREMAP) += early_ioremap.o
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obj-$(CONFIG_CMA) += cma.o
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obj-$(CONFIG_MEMORY_BALLOON) += balloon_compaction.o
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obj-$(CONFIG_PAGE_EXTENSION) += page_ext.o
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obj-$(CONFIG_CMA_DEBUGFS) += cma_debug.o
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obj-$(CONFIG_USERFAULTFD) += userfaultfd.o
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obj-$(CONFIG_IDLE_PAGE_TRACKING) += page_idle.o
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obj-$(CONFIG_FRAME_VECTOR) += frame_vector.o
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obj-$(CONFIG_DEBUG_PAGE_REF) += debug_page_ref.o
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obj-$(CONFIG_HARDENED_USERCOPY) += usercopy.o
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obj-$(CONFIG_PERCPU_STATS) += percpu-stats.o
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obj-$(CONFIG_HMM) += hmm.o
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obj-$(CONFIG_MEMFD_CREATE) += memfd.o
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