Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
uprobes: use kmap_local_page() for temporary page mappings
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/20260103084243.195125-6-ming.jvle@gmail.com
authored by
Keke Ming
and committed by
Peter Zijlstra
a491c02c
1752a1ad
+6
-6
+6
-6
kernel/events/uprobes.c
+6
-6
kernel/events/uprobes.c
···
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void uprobe_copy_from_page(struct page *page, unsigned long vaddr, void *dst, int len)
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{
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-
void *kaddr = kmap_atomic(page);
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+
void *kaddr = kmap_local_page(page);
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memcpy(dst, kaddr + (vaddr & ~PAGE_MASK), len);
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-
kunmap_atomic(kaddr);
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+
kunmap_local(kaddr);
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}
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static void copy_to_page(struct page *page, unsigned long vaddr, const void *src, int len)
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{
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void *kaddr = kmap_atomic(page);
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void *kaddr = kmap_local_page(page);
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memcpy(kaddr + (vaddr & ~PAGE_MASK), src, len);
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kunmap_atomic(kaddr);
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+
kunmap_local(kaddr);
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}
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static int verify_opcode(struct page *page, unsigned long vaddr, uprobe_opcode_t *insn,
···
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return ret == 0 ? -EBUSY : ret;
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}
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-
kaddr = kmap_atomic(page);
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+
kaddr = kmap_local_page(page);
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ptr = kaddr + (vaddr & ~PAGE_MASK);
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if (unlikely(*ptr + d < 0)) {
···
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*ptr += d;
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ret = 0;
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out:
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kunmap_atomic(kaddr);
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+
kunmap_local(kaddr);
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put_page(page);
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return ret;
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}