libkmod: kmod_file_get_contents() returns constant data

The function returns what is considered constant data and all the
callers handle it as such. Add the declaration to make things obvious.

Signed-off-by: Emil Velikov <[email protected]>
Link: #346
Signed-off-by: Lucas De Marchi <[email protected]>

Author: evelikov

libkmod/libkmod-file.c

@@ -135,7 +135,7 @@ int kmod_file_load_contents(struct kmod_file *file)
 	return file->load(file);
 }
 
-void *kmod_file_get_contents(const struct kmod_file *file)
+const void *kmod_file_get_contents(const struct kmod_file *file)
 {
 	return file->memory;
 }

libkmod/libkmod-internal.h

@@ -138,7 +138,7 @@ _nonnull_all_ bool kmod_module_is_builtin(struct kmod_module *mod);
 _must_check_ _nonnull_all_ struct kmod_file *kmod_file_open(const struct kmod_ctx *ctx, const char *filename);
 _nonnull_all_ struct kmod_elf *kmod_file_get_elf(struct kmod_file *file);
 _nonnull_all_ int kmod_file_load_contents(struct kmod_file *file);
-_must_check_ _nonnull_all_ void *kmod_file_get_contents(const struct kmod_file *file);
+_must_check_ _nonnull_all_ const void *kmod_file_get_contents(const struct kmod_file *file);
 _must_check_ _nonnull_all_ off_t kmod_file_get_size(const struct kmod_file *file);
 _must_check_ _nonnull_all_ enum kmod_file_compression_type kmod_file_get_compression(const struct kmod_file *file);
 _must_check_ _nonnull_all_ int kmod_file_get_fd(const struct kmod_file *file);