[Xen-devel] [PATCH 1/3] tools/libxc: Drop xc_cpuid_to_str()

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

This helper appears to have been introduced 10 years ago by c/s 5f14a87ceb
"x86, hvm: Guest CPUID configuration" and never had any users at all.

alloc_str() is actually an opencoded calloc(), and now only has a single
caller.  Use calloc() directly and drop alloc_str().

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Jan Beulich <JBeulich@xxxxxxxx>
CC: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
CC: Wei Liu <wei.liu2@xxxxxxxxxx>
CC: Roger Pau Monné <roger.pau@xxxxxxxxxx>
CC: Sergey Dyasli <sergey.dyasli@xxxxxxxxxx>
---
 tools/libxc/include/xenctrl.h |  2 --
 tools/libxc/xc_cpuid_x86.c    | 25 +------------------------
 2 files changed, 1 insertion(+), 26 deletions(-)

diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h
index 408fa1c..e8285db 100644
--- a/tools/libxc/include/xenctrl.h
+++ b/tools/libxc/include/xenctrl.h
@@ -1828,8 +1828,6 @@ int xc_cpuid_apply_policy(xc_interface *xch,
                           uint32_t domid,
                           uint32_t *featureset,
                           unsigned int nr_features);
-void xc_cpuid_to_str(const unsigned int *regs,
-                     char **strs); /* some strs[] may be NULL if ENOMEM */
 int xc_mca_op(xc_interface *xch, struct xen_mc *mc);
 int xc_mca_op_inject_v2(xc_interface *xch, unsigned int flags,
                         xc_cpumap_t cpumap, unsigned int nr_cpus);
diff --git a/tools/libxc/xc_cpuid_x86.c b/tools/libxc/xc_cpuid_x86.c
index 3a168a4..c5c3cdc 100644
--- a/tools/libxc/xc_cpuid_x86.c
+++ b/tools/libxc/xc_cpuid_x86.c
@@ -627,29 +627,6 @@ static int xc_cpuid_do_domctl(
     return do_domctl(xch, &domctl);
 }
 
-static char *alloc_str(void)
-{
-    char *s = malloc(33);
-    if ( s == NULL )
-        return s;
-    memset(s, 0, 33);
-    return s;
-}
-
-void xc_cpuid_to_str(const unsigned int *regs, char **strs)
-{
-    int i, j;
-
-    for ( i = 0; i < 4; i++ )
-    {
-        strs[i] = alloc_str();
-        if ( strs[i] == NULL )
-            continue;
-        for ( j = 0; j < 32; j++ )
-            strs[i][j] = !!((regs[i] & (1U << (31 - j)))) ? '1' : '0';
-    }
-}
-
 static void sanitise_featureset(struct cpuid_domain_info *info)
 {
     const uint32_t fs_size = xc_get_cpu_featureset_size();
@@ -832,7 +809,7 @@ int xc_cpuid_set(
             continue;
         }
         
-        config_transformed[i] = alloc_str();
+        config_transformed[i] = calloc(33, 1); /* 32 bits, NUL terminator. */
         if ( config_transformed[i] == NULL )
         {
             rc = -ENOMEM;
-- 
2.1.4


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