arm64/uprobes: use kmap_local_page() in arch_uprobe_copy_ixol()

Jvlegod · Peter Zijlstra · commit 094cc7bb5fc3 · 2026-01-06T16:34:27.000+01:00
Replace deprecated kmap_atomic() with kmap_local_page(). Signed-off-by: Keke Ming <ming.jvle@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Oleg Nesterov <oleg@redhat.com> Link: https://patch.msgid.link/20260103084243.195125-3-ming.jvle@gmail.com
diff --git a/arch/arm64/kernel/probes/uprobes.c b/arch/arm64/kernel/probes/uprobes.c
@@ -15,7 +15,7 @@
 void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,
 		void *src, unsigned long len)
 {
-	void *xol_page_kaddr = kmap_atomic(page);
+	void *xol_page_kaddr = kmap_local_page(page);
 	void *dst = xol_page_kaddr + (vaddr & ~PAGE_MASK);
 
 	/*
@@ -32,7 +32,7 @@ void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,
 	sync_icache_aliases((unsigned long)dst, (unsigned long)dst + len);
 
 done:
-	kunmap_atomic(xol_page_kaddr);
+	kunmap_local(xol_page_kaddr);
 }
 
 unsigned long uprobe_get_swbp_addr(struct pt_regs *regs)

Original file line number	Diff line number	Diff line change
`@@ -15,7 +15,7 @@`
`15`	`15`	`void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,`
`16`	`16`	`void *src, unsigned long len)`
`17`	`17`	`{`
`18`		`- void *xol_page_kaddr = kmap_atomic(page);`
	`18`	`+ void *xol_page_kaddr = kmap_local_page(page);`
`19`	`19`	`void *dst = xol_page_kaddr + (vaddr & ~PAGE_MASK);`
`20`	`20`
`21`	`21`	`/*`
`@@ -32,7 +32,7 @@ void arch_uprobe_copy_ixol(struct page *page, unsigned long vaddr,`
`32`	`32`	`sync_icache_aliases((unsigned long)dst, (unsigned long)dst + len);`
`33`	`33`
`34`	`34`	`done:`
`35`		`- kunmap_atomic(xol_page_kaddr);`
	`35`	`+ kunmap_local(xol_page_kaddr);`
`36`	`36`	`}`
`37`	`37`
`38`	`38`	`unsigned long uprobe_get_swbp_addr(struct pt_regs *regs)`