[PATCH 5/5] target/ppc/kvm: Replace alloca() by g_malloc()

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

The ALLOCA(3) man-page mentions its "use is discouraged".

Replace it by a g_malloc() call.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 target/ppc/kvm.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 104a308abb5..ae62daddf7d 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -2698,11 +2698,11 @@ int kvmppc_save_htab(QEMUFile *f, int fd, size_t bufsize, int64_t max_ns)
 int kvmppc_load_htab_chunk(QEMUFile *f, int fd, uint32_t index,
                            uint16_t n_valid, uint16_t n_invalid, Error **errp)
 {
-    struct kvm_get_htab_header *buf;
-    size_t chunksize = sizeof(*buf) + n_valid * HASH_PTE_SIZE_64;
+    size_t chunksize = sizeof(struct kvm_get_htab_header)
+                       + n_valid * HASH_PTE_SIZE_64;
     ssize_t rc;
+    g_autofree struct kvm_get_htab_header *buf = g_malloc(chunksize);
 
-    buf = alloca(chunksize);
     buf->index = index;
     buf->n_valid = n_valid;
     buf->n_invalid = n_invalid;
@@ -2741,10 +2741,10 @@ void kvmppc_read_hptes(ppc_hash_pte64_t *hptes, hwaddr ptex, int n)
     i = 0;
     while (i < n) {
         struct kvm_get_htab_header *hdr;
+        char buf[sizeof(*hdr) + HPTES_PER_GROUP * HASH_PTE_SIZE_64];
         int m = n < HPTES_PER_GROUP ? n : HPTES_PER_GROUP;
-        char buf[sizeof(*hdr) + m * HASH_PTE_SIZE_64];
 
-        rc = read(fd, buf, sizeof(buf));
+        rc = read(fd, buf, sizeof(*hdr) + m * HASH_PTE_SIZE_64);
         if (rc < 0) {
             hw_error("kvmppc_read_hptes: Unable to read HPTEs");
         }
-- 
2.26.3