Return early if bc->alloc is NULL. De-indent the if() ladder.
Note, this avoids a pointless call to error_propagate() with
errp=NULL at the 'out:' label.
Change trivial when reviewed with 'git-diff --ignore-all-space'.
Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org>
---
backends/hostmem.c | 133 +++++++++++++++++++++++----------------------
1 file changed, 67 insertions(+), 66 deletions(-)
diff --git a/backends/hostmem.c b/backends/hostmem.c
index 747e7838c0..1723c19165 100644
--- a/backends/hostmem.c
+++ b/backends/hostmem.c
@@ -328,83 +328,84 @@ host_memory_backend_memory_complete(UserCreatable *uc,
Error **errp)
void *ptr;
uint64_t sz;
- if (bc->alloc) {
- bc->alloc(backend, &local_err);
- if (local_err) {
- goto out;
- }
+ if (!bc->alloc) {
+ return;
+ }
+ bc->alloc(backend, &local_err);
+ if (local_err) {
+ goto out;
+ }
- ptr = memory_region_get_ram_ptr(&backend->mr);
- sz = memory_region_size(&backend->mr);
+ ptr = memory_region_get_ram_ptr(&backend->mr);
+ sz = memory_region_size(&backend->mr);
- if (backend->merge) {
- qemu_madvise(ptr, sz, QEMU_MADV_MERGEABLE);
- }
- if (!backend->dump) {
- qemu_madvise(ptr, sz, QEMU_MADV_DONTDUMP);
- }
+ if (backend->merge) {
+ qemu_madvise(ptr, sz, QEMU_MADV_MERGEABLE);
+ }
+ if (!backend->dump) {
+ qemu_madvise(ptr, sz, QEMU_MADV_DONTDUMP);
+ }
#ifdef CONFIG_NUMA
- unsigned long lastbit = find_last_bit(backend->host_nodes, MAX_NODES);
- /* lastbit == MAX_NODES means maxnode = 0 */
- unsigned long maxnode = (lastbit + 1) % (MAX_NODES + 1);
- /* ensure policy won't be ignored in case memory is preallocated
- * before mbind(). note: MPOL_MF_STRICT is ignored on hugepages so
- * this doesn't catch hugepage case. */
- unsigned flags = MPOL_MF_STRICT | MPOL_MF_MOVE;
- int mode = backend->policy;
+ unsigned long lastbit = find_last_bit(backend->host_nodes, MAX_NODES);
+ /* lastbit == MAX_NODES means maxnode = 0 */
+ unsigned long maxnode = (lastbit + 1) % (MAX_NODES + 1);
+ /* ensure policy won't be ignored in case memory is preallocated
+ * before mbind(). note: MPOL_MF_STRICT is ignored on hugepages so
+ * this doesn't catch hugepage case. */
+ unsigned flags = MPOL_MF_STRICT | MPOL_MF_MOVE;
+ int mode = backend->policy;
- /* check for invalid host-nodes and policies and give more verbose
- * error messages than mbind(). */
- if (maxnode && backend->policy == MPOL_DEFAULT) {
- error_setg(errp, "host-nodes must be empty for policy default,"
- " or you should explicitly specify a policy other"
- " than default");
- return;
- } else if (maxnode == 0 && backend->policy != MPOL_DEFAULT) {
- error_setg(errp, "host-nodes must be set for policy %s",
- HostMemPolicy_str(backend->policy));
- return;
- }
+ /* check for invalid host-nodes and policies and give more verbose
+ * error messages than mbind(). */
+ if (maxnode && backend->policy == MPOL_DEFAULT) {
+ error_setg(errp, "host-nodes must be empty for policy default,"
+ " or you should explicitly specify a policy other"
+ " than default");
+ return;
+ } else if (maxnode == 0 && backend->policy != MPOL_DEFAULT) {
+ error_setg(errp, "host-nodes must be set for policy %s",
+ HostMemPolicy_str(backend->policy));
+ return;
+ }
- /* We can have up to MAX_NODES nodes, but we need to pass maxnode+1
- * as argument to mbind() due to an old Linux bug (feature?) which
- * cuts off the last specified node. This means backend->host_nodes
- * must have MAX_NODES+1 bits available.
- */
- assert(sizeof(backend->host_nodes) >=
- BITS_TO_LONGS(MAX_NODES + 1) * sizeof(unsigned long));
- assert(maxnode <= MAX_NODES);
+ /* We can have up to MAX_NODES nodes, but we need to pass maxnode+1
+ * as argument to mbind() due to an old Linux bug (feature?) which
+ * cuts off the last specified node. This means backend->host_nodes
+ * must have MAX_NODES+1 bits available.
+ */
+ assert(sizeof(backend->host_nodes) >=
+ BITS_TO_LONGS(MAX_NODES + 1) * sizeof(unsigned long));
+ assert(maxnode <= MAX_NODES);
#ifdef HAVE_NUMA_HAS_PREFERRED_MANY
- if (mode == MPOL_PREFERRED && numa_has_preferred_many() > 0) {
- /*
- * Replace with MPOL_PREFERRED_MANY otherwise the mbind() below
- * silently picks the first node.
- */
- mode = MPOL_PREFERRED_MANY;
- }
+ if (mode == MPOL_PREFERRED && numa_has_preferred_many() > 0) {
+ /*
+ * Replace with MPOL_PREFERRED_MANY otherwise the mbind() below
+ * silently picks the first node.
+ */
+ mode = MPOL_PREFERRED_MANY;
+ }
#endif
- if (maxnode &&
- mbind(ptr, sz, mode, backend->host_nodes, maxnode + 1, flags)) {
- if (backend->policy != MPOL_DEFAULT || errno != ENOSYS) {
- error_setg_errno(errp, errno,
- "cannot bind memory to host NUMA nodes");
- return;
- }
+ if (maxnode &&
+ mbind(ptr, sz, mode, backend->host_nodes, maxnode + 1, flags)) {
+ if (backend->policy != MPOL_DEFAULT || errno != ENOSYS) {
+ error_setg_errno(errp, errno,
+ "cannot bind memory to host NUMA nodes");
+ return;
}
+ }
#endif
- /* Preallocate memory after the NUMA policy has been instantiated.
- * This is necessary to guarantee memory is allocated with
- * specified NUMA policy in place.
- */
- if (backend->prealloc) {
- qemu_prealloc_mem(memory_region_get_fd(&backend->mr), ptr, sz,
- backend->prealloc_threads,
- backend->prealloc_context, &local_err);
- if (local_err) {
- goto out;
- }
+ /* Preallocate memory after the NUMA policy has been instantiated.
+ * This is necessary to guarantee memory is allocated with
+ * specified NUMA policy in place.
+ */
+ if (backend->prealloc) {
+ qemu_prealloc_mem(memory_region_get_fd(&backend->mr), ptr, sz,
+ backend->prealloc_threads,
+ backend->prealloc_context, &local_err);
+ if (local_err) {
+ goto out;
}
}
out:
--
2.41.0
