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| author |   Dominik Dingel <dingel@linux.vnet.ibm.com> | 2016-04-27 11:43:07 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-02-23 10:06:39 +0100 |
| commit | 54397bb0bbedbb9f7d77a62f6ddc6869354e3d9f (patch) | |
| tree | 22f09ed536c33c340bd40693235c644a1141927a /arch/s390/mm/gmap.c | |
| parent | s390/chsc: Add exception handler for CHSC instruction (diff) | |
| download | linux-dev-54397bb0bbedbb9f7d77a62f6ddc6869354e3d9f.tar.xz linux-dev-54397bb0bbedbb9f7d77a62f6ddc6869354e3d9f.zip | |
s390/mm: use _SEGMENT_ENTRY_EMPTY in the code
_SEGMENT_ENTRY_INVALID denotes the invalid bit in a segment table
entry whereas _SEGMENT_ENTRY_EMPTY means that the value of the whole
entry is only the invalid bit, as the entry is completely empty.
Therefore we use _SEGMENT_ENTRY_INVALID only to check and set the
invalid bit with bitwise operations. _SEGMENT_ENTRY_EMPTY is only used
to check for (un)equality.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm/gmap.c')
| -rw-r--r-- | arch/s390/mm/gmap.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c index 59ac93714fa4..a07b1ec1391d 100644 --- a/arch/s390/mm/gmap.c +++ b/arch/s390/mm/gmap.c @@ -359,8 +359,8 @@ static int __gmap_unlink_by_vmaddr(struct gmap *gmap, unsigned long vmaddr) spin_lock(&gmap->guest_table_lock); entry = radix_tree_delete(&gmap->host_to_guest, vmaddr >> PMD_SHIFT); if (entry) { - flush = (*entry != _SEGMENT_ENTRY_INVALID); - *entry = _SEGMENT_ENTRY_INVALID; + flush = (*entry != _SEGMENT_ENTRY_EMPTY); + *entry = _SEGMENT_ENTRY_EMPTY; } spin_unlock(&gmap->guest_table_lock); return flush; @@ -589,7 +589,7 @@ int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr) return rc; ptl = pmd_lock(mm, pmd); spin_lock(&gmap->guest_table_lock); - if (*table == _SEGMENT_ENTRY_INVALID) { + if (*table == _SEGMENT_ENTRY_EMPTY) { rc = radix_tree_insert(&gmap->host_to_guest, vmaddr >> PMD_SHIFT, table); if (!rc) |