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module: merge each_symbol_section into find_symbol

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each_symbol_section is only called by find_symbol, so merge the two
functions.

Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
This commit is contained in:
Christoph Hellwig
2021-02-02 13:13:30 +01:00
committed by Jessica Yu
parent a7c38f2cd3
commit 71e4b309dc
1 changed files with 69 additions and 79 deletions
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148
kernel/module.c
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@@ -428,73 +428,6 @@ extern const s32 __start___kcrctab_unused_gpl[];
#define symversion(base, idx) ((base != NULL) ? ((base) + (idx)) : NULL) #define symversion(base, idx) ((base != NULL) ? ((base) + (idx)) : NULL)
#endif #endif
/* Returns true as soon as fn returns true, otherwise false. */
static bool each_symbol_section(bool (*fn)(const struct symsearch *arr,
struct module *owner,
void *data),
void *data)
{
unsigned int i;
struct module *mod;
static const struct symsearch arr[] = {
{ __start___ksymtab, __stop___ksymtab, __start___kcrctab,
NOT_GPL_ONLY, false },
{ __start___ksymtab_gpl, __stop___ksymtab_gpl,
__start___kcrctab_gpl,
GPL_ONLY, false },
{ __start___ksymtab_gpl_future, __stop___ksymtab_gpl_future,
__start___kcrctab_gpl_future,
WILL_BE_GPL_ONLY, false },
#ifdef CONFIG_UNUSED_SYMBOLS
{ __start___ksymtab_unused, __stop___ksymtab_unused,
__start___kcrctab_unused,
NOT_GPL_ONLY, true },
{ __start___ksymtab_unused_gpl, __stop___ksymtab_unused_gpl,
__start___kcrctab_unused_gpl,
GPL_ONLY, true },
#endif
};
module_assert_mutex_or_preempt();
for (i = 0; i < ARRAY_SIZE(arr); i++)
if (fn(&arr[i], NULL, data))
return true;
list_for_each_entry_rcu(mod, &modules, list,
lockdep_is_held(&module_mutex)) {
struct symsearch arr[] = {
{ mod->syms, mod->syms + mod->num_syms, mod->crcs,
NOT_GPL_ONLY, false },
{ mod->gpl_syms, mod->gpl_syms + mod->num_gpl_syms,
mod->gpl_crcs,
GPL_ONLY, false },
{ mod->gpl_future_syms,
mod->gpl_future_syms + mod->num_gpl_future_syms,
mod->gpl_future_crcs,
WILL_BE_GPL_ONLY, false },
#ifdef CONFIG_UNUSED_SYMBOLS
{ mod->unused_syms,
mod->unused_syms + mod->num_unused_syms,
mod->unused_crcs,
NOT_GPL_ONLY, true },
{ mod->unused_gpl_syms,
mod->unused_gpl_syms + mod->num_unused_gpl_syms,
mod->unused_gpl_crcs,
GPL_ONLY, true },
#endif
};
if (mod->state == MODULE_STATE_UNFORMED)
continue;
for (i = 0; i < ARRAY_SIZE(arr); i++)
if (fn(&arr[i], mod, data))
return true;
}
return false;
}
struct find_symbol_arg { struct find_symbol_arg {
/* Input */ /* Input */
const char *name; const char *name;
@@ -605,24 +538,81 @@ static const struct kernel_symbol *find_symbol(const char *name,
bool gplok, bool gplok,
bool warn) bool warn)
{ {
struct find_symbol_arg fsa; static const struct symsearch arr[] = {
{ __start___ksymtab, __stop___ksymtab, __start___kcrctab,
NOT_GPL_ONLY, false },
{ __start___ksymtab_gpl, __stop___ksymtab_gpl,
__start___kcrctab_gpl,
GPL_ONLY, false },
{ __start___ksymtab_gpl_future, __stop___ksymtab_gpl_future,
__start___kcrctab_gpl_future,
WILL_BE_GPL_ONLY, false },
#ifdef CONFIG_UNUSED_SYMBOLS
{ __start___ksymtab_unused, __stop___ksymtab_unused,
__start___kcrctab_unused,
NOT_GPL_ONLY, true },
{ __start___ksymtab_unused_gpl, __stop___ksymtab_unused_gpl,
__start___kcrctab_unused_gpl,
GPL_ONLY, true },
#endif
};
struct find_symbol_arg fsa = {
.name = name,
.gplok = gplok,
.warn = warn,
};
struct module *mod;
unsigned int i;
fsa.name = name; module_assert_mutex_or_preempt();
fsa.gplok = gplok;
fsa.warn = warn;
if (each_symbol_section(find_exported_symbol_in_section, &fsa)) { for (i = 0; i < ARRAY_SIZE(arr); i++)
if (owner) if (find_exported_symbol_in_section(&arr[i], NULL, &fsa))
*owner = fsa.owner; goto found;
if (crc)
*crc = fsa.crc; list_for_each_entry_rcu(mod, &modules, list,
if (license) lockdep_is_held(&module_mutex)) {
*license = fsa.license; struct symsearch arr[] = {
return fsa.sym; { mod->syms, mod->syms + mod->num_syms, mod->crcs,
NOT_GPL_ONLY, false },
{ mod->gpl_syms, mod->gpl_syms + mod->num_gpl_syms,
mod->gpl_crcs,
GPL_ONLY, false },
{ mod->gpl_future_syms,
mod->gpl_future_syms + mod->num_gpl_future_syms,
mod->gpl_future_crcs,
WILL_BE_GPL_ONLY, false },
#ifdef CONFIG_UNUSED_SYMBOLS
{ mod->unused_syms,
mod->unused_syms + mod->num_unused_syms,
mod->unused_crcs,
NOT_GPL_ONLY, true },
{ mod->unused_gpl_syms,
mod->unused_gpl_syms + mod->num_unused_gpl_syms,
mod->unused_gpl_crcs,
GPL_ONLY, true },
#endif
};
if (mod->state == MODULE_STATE_UNFORMED)
continue;
for (i = 0; i < ARRAY_SIZE(arr); i++)
if (find_exported_symbol_in_section(&arr[i], mod, &fsa))
goto found;
} }
pr_debug("Failed to find symbol %s\n", name); pr_debug("Failed to find symbol %s\n", name);
return NULL; return NULL;
found:
if (owner)
*owner = fsa.owner;
if (crc)
*crc = fsa.crc;
if (license)
*license = fsa.license;
return fsa.sym;
} }
/* /*