linux-kernel - [PATCH v4 4/4] module: Rename debug_align() as strict

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Date:   Wed, 23 Feb 2022 10:01:01 +0100
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Luis Chamberlain <mcgrof@...nel.org>, linux-modules@...r.kernel.org
Cc:     Christophe Leroy <christophe.leroy@...roup.eu>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v4 4/4] module: Rename debug_align() as strict_align()

debug_align() was added by commit 84e1c6bb38eb ("x86: Add RO/NX
protection for loadable kernel modules")

At that time the config item was CONFIG_DEBUG_SET_MODULE_RONX.

But nowadays it has changed to CONFIG_STRICT_MODULE_RWX and
debug_align() is confusing because it has nothing to do with
DEBUG.

Rename it strict_align()

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 kernel/module/internal.h |  4 ++--
 kernel/module/kallsyms.c |  4 ++--
 kernel/module/main.c     | 14 +++++++-------
 3 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/kernel/module/internal.h b/kernel/module/internal.h
index e94defbeda00..cbc268af23ae 100644
--- a/kernel/module/internal.h
+++ b/kernel/module/internal.h
@@ -26,9 +26,9 @@
  * only when CONFIG_STRICT_MODULE_RWX=y
  */
 #ifdef CONFIG_STRICT_MODULE_RWX
-# define debug_align(X) PAGE_ALIGN(X)
+# define strict_align(X) PAGE_ALIGN(X)
 #else
-# define debug_align(X) (X)
+# define strict_align(X) (X)
 #endif
 
 extern struct mutex module_mutex;
diff --git a/kernel/module/kallsyms.c b/kernel/module/kallsyms.c
index b6d49bb5afed..23034b50f8f5 100644
--- a/kernel/module/kallsyms.c
+++ b/kernel/module/kallsyms.c
@@ -139,7 +139,7 @@ void layout_symtab(struct module *mod, struct load_info *info)
 	mod->core_layout.size += strtab_size;
 	info->core_typeoffs = mod->core_layout.size;
 	mod->core_layout.size += ndst * sizeof(char);
-	mod->core_layout.size = debug_align(mod->core_layout.size);
+	mod->core_layout.size = strict_align(mod->core_layout.size);
 
 	/* Put string table section at end of init part of module. */
 	strsect->sh_flags |= SHF_ALLOC;
@@ -154,7 +154,7 @@ void layout_symtab(struct module *mod, struct load_info *info)
 	mod->init_layout.size += sizeof(struct mod_kallsyms);
 	info->init_typeoffs = mod->init_layout.size;
 	mod->init_layout.size += nsrc * sizeof(char);
-	mod->init_layout.size = debug_align(mod->init_layout.size);
+	mod->init_layout.size = strict_align(mod->init_layout.size);
 }
 
 /*
diff --git a/kernel/module/main.c b/kernel/module/main.c
index 2f950b986785..6e3a6b4efd21 100644
--- a/kernel/module/main.c
+++ b/kernel/module/main.c
@@ -1447,19 +1447,19 @@ static void layout_sections(struct module *mod, struct load_info *info)
 		}
 		switch (m) {
 		case 0: /* executable */
-			mod->core_layout.size = debug_align(mod->core_layout.size);
+			mod->core_layout.size = strict_align(mod->core_layout.size);
 			mod->core_layout.text_size = mod->core_layout.size;
 			break;
 		case 1: /* RO: text and ro-data */
-			mod->core_layout.size = debug_align(mod->core_layout.size);
+			mod->core_layout.size = strict_align(mod->core_layout.size);
 			mod->core_layout.ro_size = mod->core_layout.size;
 			break;
 		case 2: /* RO after init */
-			mod->core_layout.size = debug_align(mod->core_layout.size);
+			mod->core_layout.size = strict_align(mod->core_layout.size);
 			mod->core_layout.ro_after_init_size = mod->core_layout.size;
 			break;
 		case 4: /* whole core */
-			mod->core_layout.size = debug_align(mod->core_layout.size);
+			mod->core_layout.size = strict_align(mod->core_layout.size);
 			break;
 		}
 	}
@@ -1481,11 +1481,11 @@ static void layout_sections(struct module *mod, struct load_info *info)
 		}
 		switch (m) {
 		case 0: /* executable */
-			mod->init_layout.size = debug_align(mod->init_layout.size);
+			mod->init_layout.size = strict_align(mod->init_layout.size);
 			mod->init_layout.text_size = mod->init_layout.size;
 			break;
 		case 1: /* RO: text and ro-data */
-			mod->init_layout.size = debug_align(mod->init_layout.size);
+			mod->init_layout.size = strict_align(mod->init_layout.size);
 			mod->init_layout.ro_size = mod->init_layout.size;
 			break;
 		case 2:
@@ -1496,7 +1496,7 @@ static void layout_sections(struct module *mod, struct load_info *info)
 			mod->init_layout.ro_after_init_size = mod->init_layout.ro_size;
 			break;
 		case 4: /* whole init */
-			mod->init_layout.size = debug_align(mod->init_layout.size);
+			mod->init_layout.size = strict_align(mod->init_layout.size);
 			break;
 		}
 	}
-- 
2.34.1