parisc: Don't call faulthandler_disabled() in do_page_fault()

Browse source

It is dangerous to call faulthandler_disabled() when user_mode(regs)
is true.  The task pagefault_disabled counter is racy and it is not
updated atomically on parisc. As a result, calling faulthandler_disabled()
may cause erroneous termination.

We now handle execption fixups and termination when user_mode(regs) is
false in handle_interruption(). Thus, we can just remove the
faulthandler_disabled() check from do_page_fault().

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>

...

This commit is contained in:

John David Anglin 2022-01-04 21:34:26 +00:00 • committed by Helge Deller

parent 4b9d2a731c

commit 9d90a90855

1 changed files with 0 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

3

arch/parisc/mm/fault.c

View file