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| author | Helge Deller <deller@gmx.de> | 2024-01-31 15:37:25 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-02-23 11:25:03 +0300 |
| commit | 54944f45470af5965fb9c28cf962ec30f38a8f5b (patch) | |
| tree | 1ae89004b5fc77ba6ffb66bd81bb60ab7bbbeac9 | |
| parent | 2524299b610667fe516ee4249a21978cb714cb00 (diff) | |
| download | linux-54944f45470af5965fb9c28cf962ec30f38a8f5b.tar.xz | |
parisc: BTLB: Fix crash when setting up BTLB at CPU bringup
commit 913b9d443a0180cf0de3548f1ab3149378998486 upstream.
When using hotplug and bringing up a 32-bit CPU, ask the firmware about the
BTLB information to set up the static (block) TLB entries.
For that write access to the static btlb_info struct is needed, but
since it is marked __ro_after_init the kernel segfaults with missing
write permissions.
Fix the crash by dropping the __ro_after_init annotation.
Fixes: e5ef93d02d6c ("parisc: BTLB: Initialize BTLB tables at CPU startup")
Signed-off-by: Helge Deller <deller@gmx.de>
Cc: <stable@vger.kernel.org> # v6.6+
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/parisc/kernel/cache.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c index 268d90a9325b..127ee0bc0df0 100644 --- a/arch/parisc/kernel/cache.c +++ b/arch/parisc/kernel/cache.c @@ -58,7 +58,7 @@ int pa_serialize_tlb_flushes __ro_after_init; struct pdc_cache_info cache_info __ro_after_init; #ifndef CONFIG_PA20 -struct pdc_btlb_info btlb_info __ro_after_init; +struct pdc_btlb_info btlb_info; #endif DEFINE_STATIC_KEY_TRUE(parisc_has_cache); |