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parisc: Fix set_fixmap() on PA1.x CPUs 

Fix a kernel crash which happens on PA1.x CPUs while initializing the
FTRACE/KPROBE breakpoints.  The PTE table entries for the fixmap area
were not created correctly.

Signed-off-by: Helge Deller <deller@gmx.de>
Fixes: ccfbc68d41 ("parisc: add set_fixmap()/clear_fixmap()")
Cc: stable@vger.kernel.org # v5.2+
This commit is contained in:
Helge Deller 2021-10-31 21:58:12 +01:00
parent 1ae8e91e81
commit 6e866a4628
1 changed files with 1 additions and 4 deletions
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5
arch/parisc/mm/fixmap.c
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@ -20,12 +20,9 @@ void notrace set_fixmap(enum fixed_addresses idx, phys_addr_t phys)
pte_t *pte;
if (pmd_none(*pmd))
pmd = pmd_alloc(NULL, pud, vaddr);
pte = pte_offset_kernel(pmd, vaddr);
if (pte_none(*pte))
pte = pte_alloc_kernel(pmd, vaddr);
pte = pte_offset_kernel(pmd, vaddr);
set_pte_at(&init_mm, vaddr, pte, __mk_pte(phys, PAGE_KERNEL_RWX));
flush_tlb_kernel_range(vaddr, vaddr + PAGE_SIZE);
}