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zstd: Increase DYNAMIC_BMI2 GCC version cutoff from 4.8 to 11.0 to work around compiler segfault

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[ Upstream commit 1400c87e6c ]

Due to pending percpu improvements in -next, GCC9 and GCC10 are
crashing during the build with:

    lib/zstd/compress/huf_compress.c:1033:1: internal compiler error: Segmentation fault
     1033 | {
          | ^
    Please submit a full bug report,
    with preprocessed source if appropriate.
    See <file:///usr/share/doc/gcc-9/README.Bugs> for instructions.

The DYNAMIC_BMI2 feature is a known-challenging feature of
the ZSTD library, with an existing GCC quirk turning it off
for GCC versions below 4.8.

Increase the DYNAMIC_BMI2 version cutoff to GCC 11.0 - GCC 10.5
is the last version known to crash.

Reported-by: Michael Kelley <mhklinux@outlook.com>
Debugged-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: https://lore.kernel.org/r/SN6PR02MB415723FBCD79365E8D72CA5FD4D82@SN6PR02MB4157.namprd02.prod.outlook.com
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ingo Molnar
2025-03-21 08:38:43 +01:00
committed by Greg Kroah-Hartman
parent 8d0f280e7a
commit 97f68e7287
1 changed files with 1 additions and 1 deletions
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2
lib/zstd/common/portability_macros.h
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@@ -55,7 +55,7 @@
#ifndef DYNAMIC_BMI2
#if ((defined(__clang__) && __has_attribute(__target__)) \
|| (defined(__GNUC__) \
&& (__GNUC__ >= 5 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)))) \
&& (__GNUC__ >= 11))) \
&& (defined(__x86_64__) || defined(_M_X64)) \
&& !defined(__BMI2__)
# define DYNAMIC_BMI2 1