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| author | Bharata B Rao <bharata@linux.ibm.com> | 2020-07-09 18:49:23 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-07-20 22:57:56 +1000 |
| commit | 9ce8853b4a735c8115f55ac0e9c2b27a4c8f80b5 (patch) | |
| tree | 250c57887ea68240d00b3500088bf868d91fef23 /arch/powerpc/mm | |
| parent | 645d5ce2f7d6cb4dcf6a4e087fb550e238d24283 (diff) | |
| download | linux-9ce8853b4a735c8115f55ac0e9c2b27a4c8f80b5.tar.bz2 | |
powerpc/mm/radix: Free PUD table when freeing pagetable
remove_pagetable() isn't freeing PUD table. This causes memory
leak during memory unplug. Fix this.
Fixes: 4b5d62ca17a1 ("powerpc/mm: add radix__remove_section_mapping()")
Signed-off-by: Bharata B Rao <bharata@linux.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200709131925.922266-3-aneesh.kumar@linux.ibm.com
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/book3s64/radix_pgtable.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c index 85806a6bed4d..46ad2da3087a 100644 --- a/arch/powerpc/mm/book3s64/radix_pgtable.c +++ b/arch/powerpc/mm/book3s64/radix_pgtable.c @@ -707,6 +707,21 @@ static void free_pmd_table(pmd_t *pmd_start, pud_t *pud) pud_clear(pud); } +static void free_pud_table(pud_t *pud_start, p4d_t *p4d) +{ + pud_t *pud; + int i; + + for (i = 0; i < PTRS_PER_PUD; i++) { + pud = pud_start + i; + if (!pud_none(*pud)) + return; + } + + pud_free(&init_mm, pud_start); + p4d_clear(p4d); +} + struct change_mapping_params { pte_t *pte; unsigned long start; @@ -881,6 +896,7 @@ static void __meminit remove_pagetable(unsigned long start, unsigned long end) pud_base = (pud_t *)p4d_page_vaddr(*p4d); remove_pud_table(pud_base, addr, next); + free_pud_table(pud_base, p4d); } spin_unlock(&init_mm.page_table_lock); |