module: fix and elaborate comments
Fix and elaborate comments. Signed-off-by: Matti Linnanvuori <mattilinnanvuori@yahoo.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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@ -81,7 +81,8 @@ int unregister_module_notifier(struct notifier_block * nb)
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}
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EXPORT_SYMBOL(unregister_module_notifier);
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/* We require a truly strong try_module_get() */
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/* We require a truly strong try_module_get(): 0 means failure due to
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ongoing or failed initialization etc. */
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static inline int strong_try_module_get(struct module *mod)
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{
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if (mod && mod->state == MODULE_STATE_COMING)
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@ -952,7 +953,8 @@ static unsigned long resolve_symbol(Elf_Shdr *sechdrs,
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ret = __find_symbol(name, &owner, &crc,
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!(mod->taints & TAINT_PROPRIETARY_MODULE));
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if (ret) {
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/* use_module can fail due to OOM, or module unloading */
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/* use_module can fail due to OOM,
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or module initialization or unloading */
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if (!check_version(sechdrs, versindex, name, mod, crc) ||
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!use_module(mod, owner))
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ret = 0;
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@ -1369,7 +1371,7 @@ static int verify_export_symbols(struct module *mod)
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return ret;
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}
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/* Change all symbols so that sh_value encodes the pointer directly. */
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/* Change all symbols so that st_value encodes the pointer directly. */
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static int simplify_symbols(Elf_Shdr *sechdrs,
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unsigned int symindex,
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const char *strtab,
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