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linux/mm
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Christoph Hellwig 4246a0b63b block: add a bi_error field to struct bio 
Currently we have two different ways to signal an I/O error on a BIO:

 (1) by clearing the BIO_UPTODATE flag
 (2) by returning a Linux errno value to the bi_end_io callback

The first one has the drawback of only communicating a single possible
error (-EIO), and the second one has the drawback of not beeing persistent
when bios are queued up, and are not passed along from child to parent
bio in the ever more popular chaining scenario.  Having both mechanisms
available has the additional drawback of utterly confusing driver authors
and introducing bugs where various I/O submitters only deal with one of
them, and the others have to add boilerplate code to deal with both kinds
of error returns.

So add a new bi_error field to store an errno value directly in struct
bio and remove the existing mechanisms to clean all this up.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2015-07-29 08:55:15 -06:00
..
kasan kasan: remove duplicate definition of the macro KASAN_FREE_PAGE 2015-06-25 17:00:42 -07:00
backing-dev.c writeback: don't drain bdi_writeback_congested on bdi destruction 2015-07-02 08:46:00 -06:00
balloon_compaction.c
bootmem.c mm: page_alloc: pass PFN to __free_pages_bootmem 2015-06-30 19:44:55 -07:00
cleancache.c
cma_debug.c
cma.c mm/memblock: add extra "flags" to memblock to allow selection of memory based on attribute 2015-06-24 17:49:44 -07:00
cma.h
compaction.c
debug-pagealloc.c
debug.c
dmapool.c
early_ioremap.c
fadvise.c writeback: implement and use inode_congested() 2015-06-02 08:33:35 -06:00
failslab.c
filemap.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2015-07-04 19:36:06 -07:00
frontswap.c frontswap: allow multiple backends 2015-06-24 17:49:45 -07:00
gup.c
highmem.c
huge_memory.c mm: clarify that the function operates on hugepage pte 2015-06-24 17:49:44 -07:00
hugetlb_cgroup.c
hugetlb.c mm/hugetlb: remove unused arch hook prepare/release_hugepage 2015-06-25 17:00:35 -07:00
hwpoison-inject.c mm/memory-failure: introduce get_hwpoison_page() for consistent refcount handling 2015-06-24 17:49:42 -07:00
init-mm.c
internal.h mm: meminit: finish initialisation of struct pages before basic setup 2015-06-30 19:44:56 -07:00
interval_tree.c
Kconfig mm: meminit: initialise a subset of struct pages if CONFIG_DEFERRED_STRUCT_PAGE_INIT is set 2015-06-30 19:44:56 -07:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c mm: kmemleak_alloc_percpu() should follow the gfp from per_alloc() 2015-06-24 17:49:46 -07:00
ksm.c
list_lru.c
maccess.c
madvise.c writeback: separate out include/linux/backing-dev-defs.h 2015-06-02 08:33:34 -06:00
Makefile
memblock.c mm: page_alloc: pass PFN to __free_pages_bootmem 2015-06-30 19:44:55 -07:00
memcontrol.c Merge branch 'for-4.2/writeback' of git://git.kernel.dk/linux-block 2015-06-25 16:00:17 -07:00
memory_hotplug.c mm/memory hotplug: print the last vmemmap region at the end of hot add memory 2015-06-24 17:49:45 -07:00
memory-failure.c tracing: add trace event for memory-failure 2015-06-24 17:49:43 -07:00
memory.c mm: avoid setting up anonymous pages into file mapping 2015-07-09 11:12:48 -07:00
mempolicy.c mm, thp: respect MPOL_PREFERRED policy with non-local node 2015-06-24 17:49:46 -07:00
mempool.c
memtest.c mm/memblock: add extra "flags" to memblock to allow selection of memory based on attribute 2015-06-24 17:49:44 -07:00
migrate.c mm: clarify that the function operates on hugepage pte 2015-06-24 17:49:44 -07:00
mincore.c
mlock.c
mm_init.c mm: meminit: remove mminit_verify_page_links 2015-06-30 19:44:56 -07:00
mmap.c mm/mmap.c: optimization of do_mmap_pgoff function 2015-06-24 17:49:45 -07:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c mm: fix mprotect() behaviour on VM_LOCKED VMAs 2015-06-24 17:49:41 -07:00
mremap.c mm: new arch_remap() hook 2015-06-24 17:49:41 -07:00
msync.c
nobootmem.c mm: page_alloc: pass PFN to __free_pages_bootmem 2015-06-30 19:44:55 -07:00
nommu.c Replace module_init with appropriate alternate initcall in non modules. 2015-07-02 10:36:29 -07:00
oom_kill.c mm/oom_kill.c: print points as unsigned int 2015-06-24 17:49:44 -07:00
page_alloc.c mm: meminit: finish initialisation of struct pages before basic setup 2015-06-30 19:44:56 -07:00
page_counter.c
page_ext.c
page_io.c block: add a bi_error field to struct bio 2015-07-29 08:55:15 -06:00
page_isolation.c
page_owner.c mm/page_owner.c: use late_initcall to hook in enabling 2015-06-16 14:12:35 -04:00
page-writeback.c Merge branch 'for-4.2/writeback' of git://git.kernel.dk/linux-block 2015-06-25 16:00:17 -07:00
pagewalk.c
percpu-km.c
percpu-vm.c
percpu.c mm: kmemleak_alloc_percpu() should follow the gfp from per_alloc() 2015-06-24 17:49:46 -07:00
pgtable-generic.c mm: clarify that the function operates on hugepage pte 2015-06-24 17:49:44 -07:00
process_vm_access.c
quicklist.c
readahead.c writeback: implement and use inode_congested() 2015-06-02 08:33:35 -06:00
rmap.c Merge branch 'for-4.2/writeback' of git://git.kernel.dk/linux-block 2015-06-25 16:00:17 -07:00
shmem.c tmpfs: truncate prealloc blocks past i_size 2015-06-24 17:49:45 -07:00
slab_common.c Add __init attribute to new_kmalloc_cache 2015-07-01 14:22:33 -07:00
slab.c slab: correct size_index table before replacing the bootstrap kmem_cache_node 2015-06-24 17:49:41 -07:00
slab.h slab: correct size_index table before replacing the bootstrap kmem_cache_node 2015-06-24 17:49:41 -07:00
slob.c
slub.c slab: correct size_index table before replacing the bootstrap kmem_cache_node 2015-06-24 17:49:41 -07:00
sparse-vmemmap.c
sparse.c
swap_cgroup.c
swap_state.c
swap.c mm: drop bogus VM_BUG_ON_PAGE assert in put_page() codepath 2015-06-24 17:49:42 -07:00
swapfile.c vfs: add seq_file_path() helper 2015-06-23 18:01:07 -04:00
truncate.c
util.c
vmacache.c
vmalloc.c
vmpressure.c
vmscan.c mm: meminit: finish initialisation of struct pages before basic setup 2015-06-30 19:44:56 -07:00
vmstat.c
workingset.c
zbud.c zpool: remove zpool_evict() 2015-06-25 17:00:37 -07:00
zpool.c zpool: remove zpool_evict() 2015-06-25 17:00:37 -07:00
zsmalloc.c zpool: remove zpool_evict() 2015-06-25 17:00:37 -07:00
zswap.c zswap: runtime enable/disable 2015-06-25 17:00:37 -07:00