highmem-internal.h: fix typo in the comment for kunmap_atomic()

Replace `PREEMP_RT` with `PREEMPT_RT` in the header comment to match the
correct kernel configuration name.

Link: https://lore.kernel.org/20260505021125.1941691-1-zhouzhouyi@gmail.com
Signed-off-by: Zhouyi Zhou <zhouzhouyi@gmail.com>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/include/linux/highmem-internal.h b/include/linux/highmem-internal.h
index 0574c21ca45dacde1d2b69682c26bd67abf2ac5d..bb71e7dba4f7f39a6b6494e4e8f3af23791b16d8 100644 (file)
--- a/include/linux/highmem-internal.h
+++ b/include/linux/highmem-internal.h
@@ -262,7 +262,7 @@ static inline bool is_kmap_addr(const void *x)
  * @__addr:       Virtual address to be unmapped
  *
  * Unmaps an address previously mapped by kmap_atomic() and re-enables
- * pagefaults. Depending on PREEMP_RT configuration, re-enables also
+ * pagefaults. Depending on PREEMPT_RT configuration, re-enables also
  * migration and preemption. Users should not count on these side effects.
  *
  * Mappings should be unmapped in the reverse order that they were mapped.