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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2020-03-27 08:06:42 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2020-03-27 06:42:53 -0400 |
| commit | 7a2653612bb6f18fb236c5b0c4d28f7b459bf7c2 (patch) | |
| tree | 15c690814a85cacbcfe58c052d5b058e64c8cab0 /arch/s390/kernel/alternative.c | |
| parent | f3dd18d444c757840920434e62809b6104081b06 (diff) | |
| download | linux-7a2653612bb6f18fb236c5b0c4d28f7b459bf7c2.tar.bz2 | |
s390/gmap: return proper error code on ksm unsharing
If a signal is pending we might return -ENOMEM instead of -EINTR.
We should propagate the proper error during KSM unsharing.
unmerge_ksm_pages returns -ERESTARTSYS on signal_pending. This gets
translated by entry.S to -EINTR. It is important to get this error
code so that userspace can retry.
To make this clearer we also add -EINTR to the documentation of the
PV_ENABLE call, which calls unmerge_ksm_pages.
Fixes: 3ac8e38015d4 ("s390/mm: disable KSM for storage key enabled pages")
Reviewed-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Reported-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Tested-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/alternative.c')
0 files changed, 0 insertions, 0 deletions