path: root/common/recipes-kernel/linux/linux-yocto-4.9.21/0041-nospec-Allow-index-argument-to-have-const-qualified-.patch
diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.9.21/0041-nospec-Allow-index-argument-to-have-const-qualified-.patch')
1 files changed, 0 insertions, 68 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.9.21/0041-nospec-Allow-index-argument-to-have-const-qualified-.patch b/common/recipes-kernel/linux/linux-yocto-4.9.21/0041-nospec-Allow-index-argument-to-have-const-qualified-.patch
deleted file mode 100644
index 48dd7bd7..00000000
--- a/common/recipes-kernel/linux/linux-yocto-4.9.21/0041-nospec-Allow-index-argument-to-have-const-qualified-.patch
+++ /dev/null
@@ -1,68 +0,0 @@
-From 0f31ea4b42fd0a593d539e2278b1baa35a31a122 Mon Sep 17 00:00:00 2001
-From: Rasmus Villemoes <linux@rasmusvillemoes.dk>
-Date: Fri, 16 Feb 2018 13:20:48 -0800
-Subject: [PATCH 41/93] nospec: Allow index argument to have const-qualified
- type
-commit b98c6a160a057d5686a8c54c79cc6c8c94a7d0c8 upstream.
-The last expression in a statement expression need not be a bare
-variable, quoting gcc docs
- The last thing in the compound statement should be an expression
- followed by a semicolon; the value of this subexpression serves as the
- value of the entire construct.
-and we already use that in e.g. the min/max macros which end with a
-ternary expression.
-This way, we can allow index to have const-qualified type, which will in
-some cases avoid the need for introducing a local copy of index of
-non-const qualified type. That, in turn, can prevent readers not
-familiar with the internals of array_index_nospec from wondering about
-the seemingly redundant extra variable, and I think that's worthwhile
-considering how confusing the whole _nospec business is.
-The expression _i&_mask has type unsigned long (since that is the type
-of _mask, and the BUILD_BUG_ONs guarantee that _i will get promoted to
-that), so in order not to change the type of the whole expression, add
-a cast back to typeof(_i).
-Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
-Signed-off-by: Dan Williams <dan.j.williams@intel.com>
-Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
-Cc: Andy Lutomirski <luto@kernel.org>
-Cc: Arjan van de Ven <arjan@linux.intel.com>
-Cc: Borislav Petkov <bp@alien8.de>
-Cc: Dave Hansen <dave.hansen@linux.intel.com>
-Cc: David Woodhouse <dwmw2@infradead.org>
-Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-Cc: Josh Poimboeuf <jpoimboe@redhat.com>
-Cc: Peter Zijlstra <peterz@infradead.org>
-Cc: Thomas Gleixner <tglx@linutronix.de>
-Cc: Will Deacon <will.deacon@arm.com>
-Cc: linux-arch@vger.kernel.org
-Cc: stable@vger.kernel.org
-Link: http://lkml.kernel.org/r/151881604837.17395.10812767547837568328.stgit@dwillia2-desk3.amr.corp.intel.com
-Signed-off-by: Ingo Molnar <mingo@kernel.org>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
- include/linux/nospec.h | 3 +--
- 1 file changed, 1 insertion(+), 2 deletions(-)
-diff --git a/include/linux/nospec.h b/include/linux/nospec.h
-index fbc98e2..132e3f5 100644
---- a/include/linux/nospec.h
-+++ b/include/linux/nospec.h
-@@ -72,7 +72,6 @@ static inline unsigned long array_index_mask_nospec(unsigned long index,
- BUILD_BUG_ON(sizeof(_i) > sizeof(long)); \
- BUILD_BUG_ON(sizeof(_s) > sizeof(long)); \
- \
-- _i &= _mask; \
-- _i; \
-+ (typeof(_i)) (_i & _mask); \
- })
- #endif /* _LINUX_NOSPEC_H */