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| author | Helge Deller <deller@gmx.de> | 2021-09-03 00:24:42 +0300 |
|---|---|---|
| committer | Helge Deller <deller@gmx.de> | 2021-09-03 10:47:02 +0300 |
| commit | c42813b71a06a2ff4a155aa87ac609feeab76cf3 (patch) | |
| tree | 540c6dd6c8a11ab9b7409c67c4cc575fd905f1ee /arch/powerpc/platforms | |
| parent | e5a2cac908df691f1637f9272d4c6dec83239611 (diff) | |
| download | linux-c42813b71a06a2ff4a155aa87ac609feeab76cf3.tar.xz | |
parisc: Fix unaligned-access crash in bootloader
Kernel v5.14 has various changes to optimize unaligned memory accesses,
e.g. commit 0652035a5794 ("asm-generic: unaligned: remove byteshift helpers").
Those changes triggered an unalignment-exception and thus crashed the
bootloader on parisc because the unaligned "output_len" variable now suddenly
was read word-wise while it was read byte-wise in the past.
Fix this issue by declaring the external output_len variable as char which then
forces the compiler to generate byte-accesses.
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: Arnd Bergmann <arnd@kernel.org>
Cc: John David Anglin <dave.anglin@bell.net>
Bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102162
Fixes: 8c031ba63f8f ("parisc: Unbreak bootloader due to gcc-7 optimizations")
Fixes: 0652035a5794 ("asm-generic: unaligned: remove byteshift helpers")
Cc: <stable@vger.kernel.org> # v5.14+
Diffstat (limited to 'arch/powerpc/platforms')
0 files changed, 0 insertions, 0 deletions