[PATCH v5 0/3] Convert vmcore to use an iov_iter

Baoquan He
2022-04-02T04:30:05Z

Copy the description of v3 cover letter from Willy:
===
For some reason several people have been sending bad patches to fix
compiler warnings in vmcore recently. Here's how it should be done.
Compile-tested only on x86. As noted in the first patch, s390 should
take this conversion a bit further, but I'm not inclined to do that
work myself.

V4:
[PATCH v4 0/3] Convert vmcore to use an iov_iter
https://lore.kernel.org/all/20220318093706.161534-1-bhe at redhat.com/T/#u

v3:
[PATCH v3 0/3] Convert vmcore to use an iov_iter
https://lore.kernel.org/all/20211213143927.3069508-1-willy at infradead.org/T/#u

Changelog:
===
v5:
- Rebased on Linus's latest master branch.
- Merge the patch 4 of v4 into patch 2.

v4:
- Append one patch to replace the open code with iov_iter_count().
This is suggested by Al.
- Fix a indentation error by replacing space with tab in
arch/sh/kernel/crash_dump.c of patch 1 reported by checkpatch. The
rest of patch 1~3 are untouched.
- Add Christopy's Reviewed-by and my Acked-by for patch 1~3.
v3:
- Send the correct patches this time
v2:
- Removed unnecessary kernel-doc
- Included uio.h to fix compilation problems
- Made read_from_oldmem_iter static to avoid compile warnings during the
conversion
- Use iov_iter_truncate() (Christoph)

Matthew Wilcox (Oracle) (3):
vmcore: Convert copy_oldmem_page() to take an iov_iter
vmcore: Convert __read_vmcore to use an iov_iter
vmcore: Convert read_from_oldmem() to take an iov_iter

arch/arm/kernel/crash_dump.c | 27 +------
arch/arm64/kernel/crash_dump.c | 29 +------
arch/ia64/kernel/crash_dump.c | 32 +-------
arch/mips/kernel/crash_dump.c | 27 +------
arch/powerpc/kernel/crash_dump.c | 35 ++-------
arch/riscv/kernel/crash_dump.c | 26 +------
arch/s390/kernel/crash_dump.c | 13 ++--
arch/sh/kernel/crash_dump.c | 29 ++-----
arch/x86/kernel/crash_dump_32.c | 29 +------
arch/x86/kernel/crash_dump_64.c | 48 ++++--------
fs/proc/vmcore.c | 130 +++++++++++++------------------
include/linux/crash_dump.h | 19 ++---
12 files changed, 123 insertions(+), 321 deletions(-)

--
2.34.1