efi/runtime-wrappers: Remove out of date comment regarding in_nmi()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@linaro.org>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/1454364428-494-6-git-send-email-matt@codeblueprint.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/drivers/firmware/efi/runtime-wrappers.c b/drivers/firmware/efi/runtime-wrappers.c
index e9f2867f0d915de0830f41df9790f8d5e6413ec6..311f415bff518e709e58ed4e34f480fedefc8bf9 100644 (file)
--- a/drivers/firmware/efi/runtime-wrappers.c
+++ b/drivers/firmware/efi/runtime-wrappers.c
@@ -61,32 +61,6 @@
  */
 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