From: Helge Deller Date: Wed, 31 Jan 2024 12:37:25 +0000 (+0100) Subject: parisc: BTLB: Fix crash when setting up BTLB at CPU bringup X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=913b9d443a0180cf0de3548f1ab3149378998486;p=linux.git parisc: BTLB: Fix crash when setting up BTLB at CPU bringup 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 Cc: # v6.6+ --- diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c index 5552602fcaef1..422f3e1e6d9ca 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);