FAILED: patch "[PATCH] parisc: Fix set_fixmap() on PA1.x CPUs" failed to apply to 5.4-stable tree

The patch below does not apply to the 5.4-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 6e866a462867b60841202e900f10936a0478608c Mon Sep 17 00:00:00 2001
From: Helge Deller <[email protected]>
Date: Sun, 31 Oct 2021 21:58:12 +0100
Subject: [PATCH] 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.

index 24426a7e1a5e..cc15d737fda6 100644
@@ -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);
 }