[SRU][B][PATCH 0/2] Drop "UBUNTU: SAUCE: cachefiles: Page leaking in cachefiles_read_backing_file while vmscan is active"

[Andrea Righi]

BugLink: https://bugs.launchpad.net/bugs/1947709

[Impact]

"UBUNTU: SAUCE: cachefiles: Page leaking in cachefiles_read_backing_file while
vmscan is active" has been applied to fix a page leaking issue.

However a slightly different fix has been applied upstream to address
the same issue:

 9a24ce5b66f9 ("cachefiles: Fix page leak in cachefiles_read_backing_file while vmscan is active")

We should drop the SAUCE patch and rely on the upstream fix.

[Test case]

No test case or reproducer is available at the moment, this issue has been
found simply by reviewing the code.

[Fix]

Drop the SAUCE patch and rely on the upstream fix.

[Regression potential]

If the analysis is not correct we may re-introduce a page leak in cachefiles
(NFS for example), but it seems unlikely to happen, since the upstream fix is
addressing the page leaking already.