[PATCH v2 02/15 fix] fix: mm: pgtable: introduce generic p4d_alloc_one() and p4d_free()

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Klara Modin reported the following build error:

In file included from /home/klara/git/linux/arch/riscv/include/asm/kfence.h:8,
                 from /home/klara/git/linux/mm/kfence/core.c:34:
/home/klara/git/linux/include/asm-generic/pgalloc.h: In function ‘p4d_free’:
/home/klara/git/linux/include/asm-generic/pgalloc.h:252:24: error: passing argument 2 of ‘__p4d_free’ from incompatible pointer type [-Wincompatible-pointer-types]
  252 |         __p4d_free(mm, p4d);
      |                        ^~~
      |                        |
      |                        pud_t *
/home/klara/git/linux/include/asm-generic/pgalloc.h:244:60: note: expected ‘p4d_t *’ but argument is of type ‘pud_t *’
  244 | static inline void __p4d_free(struct mm_struct *mm, p4d_t *p4d)
      |                                                     ~~~~~~~^~~
In file included from /home/klara/git/linux/arch/riscv/include/asm/kfence.h:8,
                 from /home/klara/git/linux/mm/kfence/report.c:22:
/home/klara/git/linux/include/asm-generic/pgalloc.h: In function ‘p4d_free’:
/home/klara/git/linux/include/asm-generic/pgalloc.h:252:24: error: passing argument 2 of ‘__p4d_free’ from incompatible pointer type [-Wincompatible-pointer-types]
  252 |         __p4d_free(mm, p4d);
      |                        ^~~
      |                        |
      |                        pud_t *
/home/klara/git/linux/include/asm-generic/pgalloc.h:244:60: note: expected ‘p4d_t *’ but argument is of type ‘pud_t *’
  244 | static inline void __p4d_free(struct mm_struct *mm, p4d_t *p4d)
      |

Just fix it.

Reported-by: Klara Modin <klarasmodin@xxxxxxxxx>
Signed-off-by: Qi Zheng <zhengqi.arch@xxxxxxxxxxxxx>
---
 include/asm-generic/pgalloc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/asm-generic/pgalloc.h b/include/asm-generic/pgalloc.h
index 370f5b579ff88..e73416b2b53a8 100644
--- a/include/asm-generic/pgalloc.h
+++ b/include/asm-generic/pgalloc.h
@@ -247,7 +247,7 @@ static inline void __p4d_free(struct mm_struct *mm, p4d_t *p4d)
 }
 
 #ifndef __HAVE_ARCH_P4D_FREE
-static inline void p4d_free(struct mm_struct *mm, pud_t *p4d)
+static inline void p4d_free(struct mm_struct *mm, p4d_t *p4d)
 {
 	__p4d_free(mm, p4d);
 }
-- 
2.20.1





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