perf tools: Use compression id in decompress_kmodule()

Once we parsed out the compression ID, we dont need to iterate all
available compressions and we can call it directly.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817094813.15086-9-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 3 insertions, 21 deletions

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index d875e6956a3e..54bfe1f4762f 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -244,18 +244,6 @@ bool is_kernel_module(const char *pathname, int cpumode)
         return m.kmod;
 }
 
-static bool decompress_to_file(const char *ext, const char *filename, int output_fd)
-{
-        unsigned i;
-
-        for (i = 0; compressions[i].fmt; i++) {
-                if (!strcmp(ext, compressions[i].fmt))
-                        return !compressions[i].decompress(filename,
-                                                           output_fd);
-        }
-        return false;
-}
-
 bool dso__needs_decompress(struct dso *dso)
 {
         return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP ||
@@ -265,31 +253,25 @@ bool dso__needs_decompress(struct dso *dso)
 static int decompress_kmodule(struct dso *dso, const char *name, char *tmpbuf)
 {
         int fd = -1;
-        struct kmod_path m;
 
         if (!dso__needs_decompress(dso))
                 return -1;
 
-        if (kmod_path__parse_ext(&m, dso->long_name))
+        if (dso->comp == COMP_ID__NONE)
                 return -1;
 
-        if (!m.comp)
-                goto out;
-
         fd = mkstemp(tmpbuf);
         if (fd < 0) {
                 dso->load_errno = errno;
-                goto out;
+                return -1;
         }
 
-        if (!decompress_to_file(m.ext, name, fd)) {
+        if (compressions[dso->comp].decompress(name, fd)) {
                 dso->load_errno = DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE;
                 close(fd);
                 fd = -1;
         }
 
-out:
-        free(m.ext);
         return fd;
 }