[xen staging] hypfs: avoid effectively open-coding xzalloc_array()

[patchbot@xxxxxxx]

commit ca68c70d30d68a671a45789a85f8ace6d8360334
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Fri Apr 9 09:25:42 2021 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Apr 9 09:25:42 2021 +0200

    hypfs: avoid effectively open-coding xzalloc_array()
    
    There is a difference in generated code: xzalloc_bytes() forces
    SMP_CACHE_BYTES alignment. I think we not only don't need this here, but
    actually don't want it.
    
    To avoid the need to add a cast, do away with the only forward-declared
    struct hypfs_dyndata.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Juergen Gross <jgross@xxxxxxxx>
---
 xen/common/hypfs.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/xen/common/hypfs.c b/xen/common/hypfs.c
index 5468497404..e71f7df479 100644
--- a/xen/common/hypfs.c
+++ b/xen/common/hypfs.c
@@ -72,7 +72,7 @@ enum hypfs_lock_state {
     hypfs_write_locked
 };
 static DEFINE_PER_CPU(enum hypfs_lock_state, hypfs_locked);
-static DEFINE_PER_CPU(struct hypfs_dyndata *, hypfs_dyndata);
+static DEFINE_PER_CPU(void *, hypfs_dyndata);
 
 static DEFINE_PER_CPU(const struct hypfs_entry *, hypfs_last_node_entered);
 
@@ -160,19 +160,19 @@ static void node_exit_all(void)
 void *hypfs_alloc_dyndata(unsigned long size)
 {
     unsigned int cpu = smp_processor_id();
-    struct hypfs_dyndata **dyndata = &per_cpu(hypfs_dyndata, cpu);
+    void **dyndata = &per_cpu(hypfs_dyndata, cpu);
 
     ASSERT(per_cpu(hypfs_locked, cpu) != hypfs_unlocked);
     ASSERT(*dyndata == NULL);
 
-    *dyndata = xzalloc_bytes(size);
+    *dyndata = xzalloc_array(unsigned char, size);
 
     return *dyndata;
 }
 
 void *hypfs_get_dyndata(void)
 {
-    struct hypfs_dyndata *dyndata = this_cpu(hypfs_dyndata);
+    void *dyndata = this_cpu(hypfs_dyndata);
 
     ASSERT(dyndata);
 
@@ -181,7 +181,7 @@ void *hypfs_get_dyndata(void)
 
 void hypfs_free_dyndata(void)
 {
-    struct hypfs_dyndata **dyndata = &this_cpu(hypfs_dyndata);
+    void **dyndata = &this_cpu(hypfs_dyndata);
 
     XFREE(*dyndata);
 }
--
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