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vm: Add missing WITNESS warnings for M_WAITOK allocation

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vm_map_clip_{end,start} and lookup_clip_start allocate memory M_WAITOK
for !system_map vm_maps.  Add WITNESS warning annotation for !system_map
callers who may be holding non-sleepable locks.

Reviewed by:	markj
Sponsored by:	Dell EMC Isilon
Differential Revision:	https://reviews.freebsd.org/D25283
This commit is contained in:
Conrad Meyer 2020-06-29 16:54:00 +00:00
parent ac2adfb86d
commit 8a64110e43
1 changed files with 16 additions and 0 deletions
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16
sys/vm/vm_map.c
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@ -2379,6 +2379,11 @@ vm_map_clip_start(vm_map_t map, vm_map_entry_t entry, vm_offset_t start)
{
vm_map_entry_t new_entry;
if (!map->system_map)
WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
"%s: map %p entry %p start 0x%jx", __func__, map, entry,
(uintmax_t)start);
if (start <= entry->start)
return;
@ -2409,6 +2414,11 @@ vm_map_lookup_clip_start(vm_map_t map, vm_offset_t start,
{
vm_map_entry_t entry;
if (!map->system_map)
WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
"%s: map %p start 0x%jx prev %p", __func__, map,
(uintmax_t)start, prev_entry);
if (vm_map_lookup_entry(map, start, prev_entry)) {
entry = *prev_entry;
vm_map_clip_start(map, entry, start);
@ -2430,6 +2440,11 @@ vm_map_clip_end(vm_map_t map, vm_map_entry_t entry, vm_offset_t end)
{
vm_map_entry_t new_entry;
if (!map->system_map)
WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
"%s: map %p entry %p end 0x%jx", __func__, map, entry,
(uintmax_t)end);
if (end >= entry->end)
return;
@ -3725,6 +3740,7 @@ vm_map_delete(vm_map_t map, vm_offset_t start, vm_offset_t end)
vm_map_entry_t entry, next_entry;
VM_MAP_ASSERT_LOCKED(map);
if (start == end)
return (KERN_SUCCESS);