linux/Documentation/driver-api
Yang Yingliang 6ad805b82d doc: fix documentation about UIO_MEM_LOGICAL using
After commit d4fc5069a3 ("mm: switch s_mem and slab_cache in struct page")
page->mapping will be re-used by slab allocations and page->mapping->host
will be used in balance_dirty_pages_ratelimited() as an inode member but
it's not an inode in fact and leads an oops.

[  159.906493] Unable to handle kernel paging request at virtual address ffff200012d90be8
[  159.908029] Mem abort info:
[  159.908552]   ESR = 0x96000007
[  159.909138]   Exception class = DABT (current EL), IL = 32 bits
[  159.910155]   SET = 0, FnV = 0
[  159.910690]   EA = 0, S1PTW = 0
[  159.911241] Data abort info:
[  159.911846]   ISV = 0, ISS = 0x00000007
[  159.912567]   CM = 0, WnR = 0
[  159.913105] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000042acd000
[  159.914269] [ffff200012d90be8] pgd=000000043ffff003, pud=000000043fffe003, pmd=000000043fffa003, pte=0000000000000000
[  159.916280] Internal error: Oops: 96000007 [#1] SMP
[  159.917195] Dumping ftrace buffer:
[  159.917845]    (ftrace buffer empty)
[  159.918521] Modules linked in: uio_dev(OE)
[  159.919276] CPU: 1 PID: 295 Comm: uio_test Tainted: G           OE     5.2.0-rc4+ #46
[  159.920859] Hardware name: linux,dummy-virt (DT)
[  159.921815] pstate: 60000005 (nZCv daif -PAN -UAO)
[  159.922809] pc : balance_dirty_pages_ratelimited+0x68/0xc38
[  159.923965] lr : fault_dirty_shared_page.isra.8+0xe4/0x100
[  159.925134] sp : ffff800368a77ae0
[  159.925824] x29: ffff800368a77ae0 x28: 1ffff0006d14ce1a
[  159.926906] x27: ffff800368a670d0 x26: ffff800368a67120
[  159.927985] x25: 1ffff0006d10f5fe x24: ffff200012d90be8
[  159.929089] x23: ffff200013732000 x22: ffff80036ec03200
[  159.930172] x21: ffff200012d90bc0 x20: 1fffe400025b217d
[  159.931253] x19: ffff80036ec03200 x18: 0000000000000000
[  159.932348] x17: 0000000000000000 x16: 0ffffe0000010208
[  159.933439] x15: 0000000000000000 x14: 0000000000000000
[  159.934518] x13: 0000000000000000 x12: 0000000000000000
[  159.935596] x11: 1fffefc001b452c0 x10: ffff0fc001b452c0
[  159.936697] x9 : dfff200000000000 x8 : dfff200000000001
[  159.937781] x7 : ffff7e000da29607 x6 : ffff0fc001b452c1
[  159.938859] x5 : ffff0fc001b452c1 x4 : ffff0fc001b452c1
[  159.939944] x3 : ffff200010523ad4 x2 : 1fffe400026e659b
[  159.941065] x1 : dfff200000000000 x0 : ffff200013732cd8
[  159.942205] Call trace:
[  159.942732]  balance_dirty_pages_ratelimited+0x68/0xc38
[  159.943797]  fault_dirty_shared_page.isra.8+0xe4/0x100
[  159.944867]  do_fault+0x608/0x1250
[  159.945571]  __handle_mm_fault+0x93c/0xfb8
[  159.946412]  handle_mm_fault+0x1c0/0x360
[  159.947224]  do_page_fault+0x358/0x8d0
[  159.947993]  do_translation_fault+0xf8/0x124
[  159.948884]  do_mem_abort+0x70/0x190
[  159.949624]  el0_da+0x24/0x28

According another commit 5e901d0b15 ("scsi: qedi: Fix bad pte call trace
when iscsiuio is stopped."), using kmalloc also cause other problem.

But the documentation about UIO_MEM_LOGICAL allows using kmalloc(), remove
and don't allow using kmalloc() in documentation.

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-19 19:31:21 +02:00
..
80211 mac80211: fix missing/malformed documentation 2019-02-01 12:11:13 +01:00
acpi Documentation: ACPI: move scan_handlers.txt to driver-api/acpi and convert to reST 2019-04-25 23:07:19 +02:00
dmaengine doc:dmaengine: clarify DMA desc. pointer after submission 2019-02-11 08:40:16 -07:00
firmware Documentation: driver-api: add stratix10 service layer 2018-11-26 20:15:07 +01:00
fpga docs: fpga: document programming fpgas using regions 2018-10-16 11:13:50 +02:00
gpio gpio: Update documentation 2019-05-07 16:32:12 +02:00
i3c docs: driver-api: Add I3C documentation 2018-11-12 10:33:49 +01:00
iio docs: driver-api: iio: fix errors in documentation 2019-03-04 12:51:17 -07:00
pci Documentation: Kill all references to mmiowb() 2019-04-08 12:00:45 +01:00
pm Documentation: PM: Unify copyright notices 2019-04-08 12:57:47 +02:00
soundwire Documentation: soundwire: Ensure that code is inside the code blocks 2019-04-02 07:59:56 -06:00
usb USB: core: Fix bug caused by duplicate interface PM usage counter 2019-04-19 21:15:13 +02:00
basics.rst docs: Introduce deprecated APIs list 2018-10-18 12:22:43 -06:00
clk.rst This time we have a good set of changes to the core framework that do some 2018-06-09 12:06:24 -07:00
component.rst drm/doc: document recommended component helper usage 2019-02-19 12:22:24 +01:00
conf.py doc-rst: make driver-api folder buildable stand-alone 2016-10-26 17:25:00 -06:00
device-io.rst Documentation: Kill all references to mmiowb() 2019-04-08 12:00:45 +01:00
device_connection.rst Documentation: driver-api: fix device_connection.rst kernel-doc error 2018-04-27 17:17:34 -06:00
device_link.rst typed componented support + i915/snd-hda changes 2019-02-11 20:32:31 +01:00
dma-buf.rst dma-fence: Polish kernel-doc for dma-fence.c 2018-07-04 12:18:37 +02:00
edac.rst edac.rst: move concepts dictionary from edac.h 2016-12-15 08:58:12 -02:00
firewire.rst FireWire: add driver-api Introduction section 2018-09-06 09:41:16 -06:00
frame-buffer.rst
generic-counter.rst counter: fix Documentation build error due to incorrect source file name 2019-05-20 13:18:45 -06:00
hsi.rst docs: split up serial-interfaces.rst 2016-09-06 09:14:52 -06:00
i2c.rst Merge branch 'i2c/for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux 2017-07-12 10:04:56 -07:00
index.rst Staging / IIO driver patches for 5.2-rc1 2019-05-07 13:31:29 -07:00
infrastructure.rst dma-mapping: move all DMA mapping code to kernel/dma 2018-06-14 08:50:37 +02:00
input.rst
libata.rst libata: remove ata_sff_data_xfer_noirq() 2018-07-11 10:45:28 -07:00
message-based.rst docs: Don't format internal MPT docs 2016-09-06 09:15:48 -06:00
misc_devices.rst docs-rst: core_api: move driver-specific stuff to drivers_api 2017-04-02 14:17:43 -06:00
miscellaneous.rst docs: driver-api: Remove trailing blank line 2017-08-07 14:27:45 -06:00
mtdnand.rst mtd: rawnand: Deprecate ->chip_delay 2018-10-03 11:12:25 +02:00
pinctl.rst pinctrl.txt: Remove outdated information 2019-01-28 10:07:58 +01:00
rapidio.rst docs-rst: convert rapidio book to ReST 2017-05-16 08:44:16 -03:00
regulator.rst docs: Convert the regulator docbook to RST 2017-01-31 17:31:41 -07:00
s390-drivers.rst s390/docs: reword airq section 2018-02-02 10:47:15 +01:00
scsi.rst scsi: target: add driver-api document 2018-04-20 19:14:40 -04:00
slimbus.rst slimbus: stream: add stream support 2018-07-07 17:25:23 +02:00
sound.rst
spi.rst docs: split up serial-interfaces.rst 2016-09-06 09:14:52 -06:00
target.rst scsi: target: add driver-api document 2018-04-20 19:14:40 -04:00
uio-howto.rst doc: fix documentation about UIO_MEM_LOGICAL using 2019-06-19 19:31:21 +02:00
vme.rst docs: Update VME documentation to include kerneldoc comments 2017-03-17 15:10:49 +09:00
w1.rst There has been a fair amount of activity in the docs tree this time 2017-07-03 21:13:25 -07:00