linux/drivers/s390/char
Alexander Gordeev ebbc957016 s390/crash: support multi-segment iterators
Make it possible to handle not only single-, but also multi-
segment iterators in copy_oldmem_iter() callback. Change the
semantics of called functions to match the iterator model -
instead of an error code the exact number of bytes copied is
returned.

The swap page used to copy data to user space is adopted for
kernel space too. That does not bring any performance impact.

Suggested-by: Matthew Wilcox <willy@infradead.org>
Fixes: cc02e6e21a ("s390/crash: add missing iterator advance in copy_oldmem_page()")
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Tested-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Link: https://lore.kernel.org/r/5af6da3a0bffe48a90b0b7139ecf6a818b2d18e8.1658206891.git.agordeev@linux.ibm.com
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
2022-07-20 17:21:41 +02:00
..
con3215.c s390/consoles: improve panic notifiers reliability 2022-05-06 20:45:13 +02:00
con3270.c s390/consoles: improve panic notifiers reliability 2022-05-06 20:45:13 +02:00
ctrlchar.c s390/ctrlchar: fix kernel doc comment 2021-09-07 13:38:42 +02:00
ctrlchar.h
defkeymap.c
defkeymap.map
diag_ftp.c s390/extable: move EX_TABLE define to asm-extable.h 2022-03-08 00:33:00 +01:00
diag_ftp.h
fs3270.c *: convert stream-like files from nonseekable_open -> stream_open 2019-05-06 17:46:41 +03:00
hmcdrv_cache.c
hmcdrv_cache.h
hmcdrv_dev.c
hmcdrv_dev.h
hmcdrv_ftp.c s390/hmcdrv_ftp: fix kernel doc comment 2021-09-07 13:38:42 +02:00
hmcdrv_ftp.h
hmcdrv_mod.c
Kconfig s390/uv_uapi: depend on CONFIG_S390 2022-05-25 05:11:36 -04:00
keyboard.c TTY/Serial driver patches for 4.19-rc1 2018-08-18 10:50:41 -07:00
keyboard.h tty: the rest, stop using tty_schedule_flip() 2021-11-25 18:35:23 +01:00
Makefile drivers/s390/char: Add Ultravisor io device 2022-05-20 16:38:35 +02:00
monreader.c s390/monreader: Remove power management support 2021-06-18 16:41:20 +02:00
monwriter.c s390/monwriter: Remove power management support 2021-06-18 16:41:20 +02:00
raw3270.c s390/consoles: improve panic notifiers reliability 2022-05-06 20:45:13 +02:00
raw3270.h s390/consoles: improve panic notifiers reliability 2022-05-06 20:45:13 +02:00
sclp_ap.c s390/sclp: Add support for SCLP AP adapter config/deconfig 2020-10-07 21:50:00 +02:00
sclp_cmd.c s390: remove invalid email address of Heiko Carstens 2022-02-06 23:31:29 +01:00
sclp_con.c s390/consoles: improve panic notifiers reliability 2022-05-06 20:45:13 +02:00
sclp_config.c s390: remove invalid email address of Heiko Carstens 2022-02-06 23:31:29 +01:00
sclp_cpi_sys.c
sclp_cpi_sys.h
sclp_ctl.c
sclp_diag.h
sclp_early_core.c s390/boot: move sclp early buffer from fixed address in asm to C 2021-07-27 09:39:15 +02:00
sclp_early.c s390/sclp: add detection of IPL-complete-control facility 2022-04-25 13:54:12 +02:00
sclp_ftp.c s390/hmcdrv: fix kernel doc comments 2021-10-26 15:21:29 +02:00
sclp_ftp.h
sclp_ocf.c
sclp_pci.c s390: Replace zero-length array with flexible-array member 2020-02-27 16:02:21 +01:00
sclp_quiesce.c s390/sclp: Remove quiesce power management support 2021-06-18 16:41:20 +02:00
sclp_rw.c TTY / Serial patches for 5.14-rc1 2021-07-05 14:08:24 -07:00
sclp_rw.h TTY / Serial patches for 5.14-rc1 2021-07-05 14:08:24 -07:00
sclp_sd.c s390/sclp_sd: use default_groups in kobj_type 2022-01-08 17:44:05 +01:00
sclp_sdias.c s390/sclp_sdias: fix sclp_sdias_copy() virtual vs physical address confusion 2022-02-06 23:31:29 +01:00
sclp_sdias.h
sclp_tty.c tty: drop put_tty_driver 2021-07-27 12:17:21 +02:00
sclp_tty.h
sclp_vt220.c s390/consoles: improve panic notifiers reliability 2022-05-06 20:45:13 +02:00
sclp.c s390: cleanup timer API use 2022-03-27 22:18:39 +02:00
sclp.h s390/extable: move EX_TABLE define to asm-extable.h 2022-03-08 00:33:00 +01:00
tape_34xx.c s390/tape: use bitwise instead of arithmetic operator for flags 2022-03-27 22:18:38 +02:00
tape_3590.c s390/tape: Fix spelling mistake in function name tape_3590_erp_succeded 2021-01-27 13:00:47 +01:00
tape_3590.h
tape_char.c s390: Fix fall-through warnings for Clang 2021-07-13 14:43:09 -05:00
tape_class.c s390/tape: replace PTR_RET with PTR_ERR_OR_ZERO 2018-07-19 16:37:37 +02:00
tape_class.h
tape_core.c s390/tape: remove unsupported PM functions 2020-12-02 18:19:24 +01:00
tape_proc.c s390/drivers: fix proc/debugfs file permissions 2018-12-13 10:42:24 +01:00
tape_std.c s390/tape: fix timer initialization in tape_std_assign() 2021-11-08 14:17:49 +01:00
tape_std.h s390: remove orphaned function declarations 2020-09-30 12:09:54 +02:00
tape.h s390/tape: remove unsupported PM functions 2020-12-02 18:19:24 +01:00
tty3270.c tty: drop put_tty_driver 2021-07-27 12:17:21 +02:00
tty3270.h
uvdevice.c drivers/s390/char: Add Ultravisor io device 2022-05-20 16:38:35 +02:00
vmcp.c s390/vmcp: use page_to_virt instead of page_to_phys 2021-12-06 14:42:25 +01:00
vmlogrdr.c s390/vmlogrdr: Remove power management support 2021-06-18 16:41:21 +02:00
vmur.c whack-a-mole: don't open-code iminor/imajor 2021-02-23 10:25:29 -05:00
vmur.h
zcore.c s390/crash: support multi-segment iterators 2022-07-20 17:21:41 +02:00