linux-kernel - [tip:efi/core] efi/runtime-wrappers: Remove out of date comment regarding in

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Message-ID: <tip-774846defceb16dcab2f0215cfc467f7c93f1c26@git.kernel.org>
Date:	Wed, 3 Feb 2016 03:32:27 -0800
From:	tip-bot for Ard Biesheuvel <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	bp@...en8.de, linux-kernel@...r.kernel.org, dvlasenk@...hat.com,
	torvalds@...ux-foundation.org, matt@...eblueprint.co.uk,
	brgerst@...il.com, peterz@...radead.org, hpa@...or.com,
	mingo@...nel.org, tglx@...utronix.de, ard.biesheuvel@...aro.org
Subject: [tip:efi/core] efi/runtime-wrappers:
  Remove out of date comment regarding in_nmi()

Commit-ID:  774846defceb16dcab2f0215cfc467f7c93f1c26
Gitweb:     http://git.kernel.org/tip/774846defceb16dcab2f0215cfc467f7c93f1c26
Author:     Ard Biesheuvel <ard.biesheuvel@...aro.org>
AuthorDate: Mon, 1 Feb 2016 22:06:59 +0000
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 3 Feb 2016 11:31:04 +0100

efi/runtime-wrappers: Remove out of date comment regarding in_nmi()

This code is long gone, so remove the comment as well.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@...aro.org>
Signed-off-by: Matt Fleming <matt@...eblueprint.co.uk>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Brian Gerst <brgerst@...il.com>
Cc: Denys Vlasenko <dvlasenk@...hat.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: linux-efi@...r.kernel.org
Link: http://lkml.kernel.org/r/1454364428-494-6-git-send-email-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 drivers/firmware/efi/runtime-wrappers.c | 26 --------------------------
 1 file changed, 26 deletions(-)

diff --git a/drivers/firmware/efi/runtime-wrappers.c b/drivers/firmware/efi/runtime-wrappers.c
index e9f2867..311f415 100644
--- a/drivers/firmware/efi/runtime-wrappers.c
+++ b/drivers/firmware/efi/runtime-wrappers.c
@@ -62,32 +62,6 @@
 static DEFINE_SPINLOCK(efi_runtime_lock);
 
 /*
- * Some runtime services calls can be reentrant under NMI, even if the table
- * above says they are not. (source: UEFI Specification v2.4A)
- *
- * Table 32. Functions that may be called after Machine Check, INIT and NMI
- * +----------------------------+------------------------------------------+
- * | Function			| Called after Machine Check, INIT and NMI |
- * +----------------------------+------------------------------------------+
- * | GetTime()			| Yes, even if previously busy.		   |
- * | GetVariable()		| Yes, even if previously busy		   |
- * | GetNextVariableName()	| Yes, even if previously busy		   |
- * | QueryVariableInfo()	| Yes, even if previously busy		   |
- * | SetVariable()		| Yes, even if previously busy		   |
- * | UpdateCapsule()		| Yes, even if previously busy		   |
- * | QueryCapsuleCapabilities()	| Yes, even if previously busy		   |
- * | ResetSystem()		| Yes, even if previously busy		   |
- * +----------------------------+------------------------------------------+
- *
- * In order to prevent deadlocks under NMI, the wrappers for these functions
- * may only grab the efi_runtime_lock or rtc_lock spinlocks if !efi_in_nmi().
- * However, not all of the services listed are reachable through NMI code paths,
- * so the the special handling as suggested by the UEFI spec is only implemented
- * for QueryVariableInfo() and SetVariable(), as these can be reached in NMI
- * context through efi_pstore_write().
- */
-
-/*
  * As per commit ef68c8f87ed1 ("x86: Serialize EFI time accesses on rtc_lock"),
  * the EFI specification requires that callers of the time related runtime
  * functions serialize with other CMOS accesses in the kernel, as the EFI time