On 2/28/23 01:20, Sam James wrote:
On 27 Jan 2023, at 21:39, Helge Deller <deller@xxxxxx> wrote:
Matthew Wilcox noticed, that if ARCH_HAS_FLUSH_ON_KUNMAP is defined
(which is the case for PA-RISC), __kunmap_local() calls
kunmap_flush_on_unmap(), which may call the parisc flush functions with
a non-page-aligned address and thus the page might not be fully flushed.
To prevent similiar cases, page-align any given address in the
following parisc low-level calls:
- clear_page_asm(),
- copy_page_asm(),
- copy_user_page_asm(),
- clear_user_page_asm(),
- flush_kernel_dcache_page_asm(),
- purge_kernel_dcache_page_asm() and
- flush_kernel_icache_page()
Signed-off-by: Helge Deller <deller@xxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Ira Weiny <ira.weiny@xxxxxxxxx>
Cc: Fabio M. De Francesco <fmdefrancesco@xxxxxxxxx>
Is this patch obsolete as of https://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux.git/commit/?h=for-next&id=76008c1008dca3cdd7709f4a468b0c3ff9787632
or still relevant?
Asking because I want to know if I should carry on testing with it or not.
You can drop it. I'm going to drop it from my for-next git tree as well.
Helge
