diff mbox series

[9/9] testmmiotrace: eliminate anonymous module_init & module_exit

Message ID 20220316192010.19001-10-rdunlap@infradead.org (mailing list archive)
State Not Applicable
Headers show
Series treewide: eliminate anonymous module_init & module_exit | expand

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netdev/fixes_present success Fixes tag not required for -next series
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netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 4 maintainers not CCed: linux-arm-kernel@lists.infradead.org mcoquelin.stm32@gmail.com alexandre.torgue@foss.st.com linux-stm32@st-md-mailman.stormreply.com
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success Fixes tag looks correct
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netdev/source_inline success Was 0 now: 0
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Commit Message

Randy Dunlap March 16, 2022, 7:20 p.m. UTC 
Eliminate anonymous module_init() and module_exit(), which can lead to
confusion or ambiguity when reading System.map, crashes/oops/bugs,
or an initcall_debug log.

Give each of these init and exit functions unique driver-specific
names to eliminate the anonymous names.

Example 1: (System.map)
 ffffffff832fc78c t init
 ffffffff832fc79e t init
 ffffffff832fc8f8 t init

Example 2: (initcall_debug log)
 calling  init+0x0/0x12 @ 1
 initcall init+0x0/0x12 returned 0 after 15 usecs
 calling  init+0x0/0x60 @ 1
 initcall init+0x0/0x60 returned 0 after 2 usecs
 calling  init+0x0/0x9a @ 1
 initcall init+0x0/0x9a returned 0 after 74 usecs

Fixes: 8b7d89d02ef3 ("x86: mmiotrace - trace memory mapped IO")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Karol Herbst <karolherbst@gmail.com>
Cc: Pekka Paalanen <ppaalanen@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: nouveau@lists.freedesktop.org
Cc: x86@kernel.org
---
 arch/x86/mm/testmmiotrace.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Comments

Steven Rostedt March 17, 2022, 2:38 a.m. UTC | #1 
On Wed, 16 Mar 2022 12:20:10 -0700
Randy Dunlap <rdunlap@infradead.org> wrote:

> Eliminate anonymous module_init() and module_exit(), which can lead to
> confusion or ambiguity when reading System.map, crashes/oops/bugs,
> or an initcall_debug log.
> 
> Give each of these init and exit functions unique driver-specific
> names to eliminate the anonymous names.
> 
> Example 1: (System.map)
>  ffffffff832fc78c t init
>  ffffffff832fc79e t init
>  ffffffff832fc8f8 t init
> 
> Example 2: (initcall_debug log)
>  calling  init+0x0/0x12 @ 1
>  initcall init+0x0/0x12 returned 0 after 15 usecs
>  calling  init+0x0/0x60 @ 1
>  initcall init+0x0/0x60 returned 0 after 2 usecs
>  calling  init+0x0/0x9a @ 1
>  initcall init+0x0/0x9a returned 0 after 74 usecs
> 
> Fixes: 8b7d89d02ef3 ("x86: mmiotrace - trace memory mapped IO")
> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
> Cc: Thomas Gleixner <tglx@linutronix.de>
> Cc: Steven Rostedt <rostedt@goodmis.org>

Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>

-- Steve

> Cc: Ingo Molnar <mingo@kernel.org>
> Cc: Karol Herbst <karolherbst@gmail.com>
> Cc: Pekka Paalanen <ppaalanen@gmail.com>
> Cc: Dave Hansen <dave.hansen@linux.intel.com>
> Cc: Andy Lutomirski <luto@kernel.org>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: Borislav Petkov <bp@alien8.de>
> Cc: "H. Peter Anvin" <hpa@zytor.com>
> Cc: nouveau@lists.freedesktop.org
> Cc: x86@kernel.org
> ---
>  arch/x86/mm/testmmiotrace.c |    8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> --- lnx-517-rc8.orig/arch/x86/mm/testmmiotrace.c
> +++ lnx-517-rc8/arch/x86/mm/testmmiotrace.c
> @@ -113,7 +113,7 @@ static void do_test_bulk_ioremapping(voi
>  	synchronize_rcu();
>  }
>  
> -static int __init init(void)
> +static int __init testmmiotrace_init(void)
>  {
>  	unsigned long size = (read_far) ? (8 << 20) : (16 << 10);
>  	int ret = security_locked_down(LOCKDOWN_MMIOTRACE);
> @@ -136,11 +136,11 @@ static int __init init(void)
>  	return 0;
>  }
>  
> -static void __exit cleanup(void)
> +static void __exit testmmiotrace_cleanup(void)
>  {
>  	pr_debug("unloaded.\n");
>  }
>  
> -module_init(init);
> -module_exit(cleanup);
> +module_init(testmmiotrace_init);
> +module_exit(testmmiotrace_cleanup);
>  MODULE_LICENSE("GPL");
diff mbox series

Patch

--- lnx-517-rc8.orig/arch/x86/mm/testmmiotrace.c
+++ lnx-517-rc8/arch/x86/mm/testmmiotrace.c
@@ -113,7 +113,7 @@  static void do_test_bulk_ioremapping(voi
 	synchronize_rcu();
 }
 
-static int __init init(void)
+static int __init testmmiotrace_init(void)
 {
 	unsigned long size = (read_far) ? (8 << 20) : (16 << 10);
 	int ret = security_locked_down(LOCKDOWN_MMIOTRACE);
@@ -136,11 +136,11 @@  static int __init init(void)
 	return 0;
 }
 
-static void __exit cleanup(void)
+static void __exit testmmiotrace_cleanup(void)
 {
 	pr_debug("unloaded.\n");
 }
 
-module_init(init);
-module_exit(cleanup);
+module_init(testmmiotrace_init);
+module_exit(testmmiotrace_cleanup);
 MODULE_LICENSE("GPL");