update hdmi driver: support 480p

[firefly-linux-kernel-4.4.55.git] / kernel / module.c

diff --git a/kernel/module.c b/kernel/module.c
index fe748a86d452030b8d44fcb7731c1badeb93c33c..4b270e666212e29c083d6d012000794599438e73 100644 (file)
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -870,7 +870,6 @@ SYSCALL_DEFINE2(delete_module, const char __user *, name_user,
        mutex_lock(&module_mutex);
        /* Store the name of the last unloaded module for diagnostic purposes */
        strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module));
-       ddebug_remove_module(mod->name);
        free_module(mod);
 
  out:
@@ -1030,11 +1029,23 @@ static int try_to_force_load(struct module *mod, const char *reason)
 }
 
 #ifdef CONFIG_MODVERSIONS
+/* If the arch applies (non-zero) relocations to kernel kcrctab, unapply it. */
+static unsigned long maybe_relocated(unsigned long crc,
+                                    const struct module *crc_owner)
+{
+#ifdef ARCH_RELOCATES_KCRCTAB
+       if (crc_owner == NULL)
+               return crc - (unsigned long)reloc_start;
+#endif
+       return crc;
+}
+
 static int check_version(Elf_Shdr *sechdrs,
                         unsigned int versindex,
                         const char *symname,
                         struct module *mod, 
-                        const unsigned long *crc)
+                        const unsigned long *crc,
+                        const struct module *crc_owner)
 {
        unsigned int i, num_versions;
        struct modversion_info *versions;
@@ -1055,10 +1066,10 @@ static int check_version(Elf_Shdr *sechdrs,
                if (strcmp(versions[i].name, symname) != 0)
                        continue;
 
-               if (versions[i].crc == *crc)
+               if (versions[i].crc == maybe_relocated(*crc, crc_owner))
                        return 1;
                DEBUGP("Found checksum %lX vs module %lX\n",
-                      *crc, versions[i].crc);
+                      maybe_relocated(*crc, crc_owner), versions[i].crc);
                goto bad_version;
        }
 
@@ -1081,7 +1092,8 @@ static inline int check_modstruct_version(Elf_Shdr *sechdrs,
        if (!find_symbol(MODULE_SYMBOL_PREFIX "module_layout", NULL,
                         &crc, true, false))
                BUG();
-       return check_version(sechdrs, versindex, "module_layout", mod, crc);
+       return check_version(sechdrs, versindex, "module_layout", mod, crc,
+                            NULL);
 }
 
 /* First part is kernel version, which we ignore if module has crcs. */
@@ -1099,7 +1111,8 @@ static inline int check_version(Elf_Shdr *sechdrs,
                                unsigned int versindex,
                                const char *symname,
                                struct module *mod, 
-                               const unsigned long *crc)
+                               const unsigned long *crc,
+                               const struct module *crc_owner)
 {
        return 1;
 }
@@ -1134,8 +1147,8 @@ static const struct kernel_symbol *resolve_symbol(Elf_Shdr *sechdrs,
        /* use_module can fail due to OOM,
           or module initialization or unloading */
        if (sym) {
-               if (!check_version(sechdrs, versindex, name, mod, crc) ||
-                   !use_module(mod, owner))
+               if (!check_version(sechdrs, versindex, name, mod, crc, owner)
+                   || !use_module(mod, owner))
                        sym = NULL;
        }
        return sym;
@@ -1146,6 +1159,12 @@ static const struct kernel_symbol *resolve_symbol(Elf_Shdr *sechdrs,
  * J. Corbet <corbet@lwn.net>
  */
 #if defined(CONFIG_KALLSYMS) && defined(CONFIG_SYSFS)
+
+static inline bool sect_empty(const Elf_Shdr *sect)
+{
+       return !(sect->sh_flags & SHF_ALLOC) || sect->sh_size == 0;
+}
+
 struct module_sect_attr
 {
        struct module_attribute mattr;
@@ -1187,7 +1206,7 @@ static void add_sect_attrs(struct module *mod, unsigned int nsect,
 
        /* Count loaded sections and allocate structures */
        for (i = 0; i < nsect; i++)
-               if (sechdrs[i].sh_flags & SHF_ALLOC)
+               if (!sect_empty(&sechdrs[i]))
                        nloaded++;
        size[0] = ALIGN(sizeof(*sect_attrs)
                        + nloaded * sizeof(sect_attrs->attrs[0]),
@@ -1205,7 +1224,7 @@ static void add_sect_attrs(struct module *mod, unsigned int nsect,
        sattr = &sect_attrs->attrs[0];
        gattr = &sect_attrs->grp.attrs[0];
        for (i = 0; i < nsect; i++) {
-               if (! (sechdrs[i].sh_flags & SHF_ALLOC))
+               if (sect_empty(&sechdrs[i]))
                        continue;
                sattr->address = sechdrs[i].sh_addr;
                sattr->name = kstrdup(secstrings + sechdrs[i].sh_name,
@@ -1289,7 +1308,7 @@ static void add_notes_attrs(struct module *mod, unsigned int nsect,
        /* Count notes sections and allocate structures.  */
        notes = 0;
        for (i = 0; i < nsect; i++)
-               if ((sechdrs[i].sh_flags & SHF_ALLOC) &&
+               if (!sect_empty(&sechdrs[i]) &&
                    (sechdrs[i].sh_type == SHT_NOTE))
                        ++notes;
 
@@ -1305,7 +1324,7 @@ static void add_notes_attrs(struct module *mod, unsigned int nsect,
        notes_attrs->notes = notes;
        nattr = &notes_attrs->attrs[0];
        for (loaded = i = 0; i < nsect; ++i) {
-               if (!(sechdrs[i].sh_flags & SHF_ALLOC))
+               if (sect_empty(&sechdrs[i]))
                        continue;
                if (sechdrs[i].sh_type == SHT_NOTE) {
                        nattr->attr.name = mod->sect_attrs->attrs[loaded].name;
@@ -1513,6 +1532,9 @@ static void free_module(struct module *mod)
        remove_sect_attrs(mod);
        mod_kobject_remove(mod);
 
+       /* Remove dynamic debug info */
+       ddebug_remove_module(mod->name);
+
        /* Arch-specific cleanup. */
        module_arch_cleanup(mod);
 
@@ -1992,12 +2014,14 @@ static inline unsigned long layout_symtab(struct module *mod,
                                          Elf_Shdr *sechdrs,
                                          unsigned int symindex,
                                          unsigned int strindex,
-                                         const Elf_Hdr *hdr,
+                                         const Elf_Ehdr *hdr,
                                          const char *secstrings,
                                          unsigned long *pstroffs,
                                          unsigned long *strmap)
 {
+       return 0;
 }
+
 static inline void add_kallsyms(struct module *mod,
                                Elf_Shdr *sechdrs,
                                unsigned int shnum,
@@ -2081,9 +2105,8 @@ static noinline struct module *load_module(void __user *umod,
        struct module *mod;
        long err = 0;
        void *percpu = NULL, *ptr = NULL; /* Stops spurious gcc warning */
-#ifdef CONFIG_KALLSYMS
        unsigned long symoffs, stroffs, *strmap;
-#endif
+
        mm_segment_t old_fs;
 
        DEBUGP("load_module: umod=%p, len=%lu, uargs=%p\n",