diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2024-02-16 13:17:34 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2024-03-03 14:18:45 +0300 |
| commit | 9cbacb834b4afcb55eb8ac5115fa82fc7ede5c83 (patch) | |
| tree | ecc655227ddf3507515e9aea2664c8605564c524 /arch/powerpc/mm/book3s64 | |
| parent | 3c8016e681c5e0f5f3ad15edb4569727cd32eaff (diff) | |
| download | linux-9cbacb834b4afcb55eb8ac5115fa82fc7ede5c83.tar.xz | |
powerpc: Don't ignore errors from set_memory_{n}p() in __kernel_map_pages()
set_memory_p() and set_memory_np() can fail.
As mentioned in linux/mm.h:
/*
* To support DEBUG_PAGEALLOC architecture must ensure that
* __kernel_map_pages() never fails
*/
So panic in case set_memory_p() or set_memory_np() fail
in __kernel_map_pages().
Link: https://github.com/KSPP/linux/issues/7
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20ef75884aa6a636e8298736f3d1056b0793d3d9.1708078640.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/mm/book3s64')
| -rw-r--r-- | arch/powerpc/mm/book3s64/hash_utils.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/mm/book3s64/hash_utils.c b/arch/powerpc/mm/book3s64/hash_utils.c index 0626a25b0d72..01c3b4b65241 100644 --- a/arch/powerpc/mm/book3s64/hash_utils.c +++ b/arch/powerpc/mm/book3s64/hash_utils.c @@ -2172,7 +2172,7 @@ static void kernel_unmap_linear_page(unsigned long vaddr, unsigned long lmi) mmu_kernel_ssize, 0); } -void hash__kernel_map_pages(struct page *page, int numpages, int enable) +int hash__kernel_map_pages(struct page *page, int numpages, int enable) { unsigned long flags, vaddr, lmi; int i; @@ -2189,6 +2189,7 @@ void hash__kernel_map_pages(struct page *page, int numpages, int enable) kernel_unmap_linear_page(vaddr, lmi); } local_irq_restore(flags); + return 0; } #endif /* CONFIG_DEBUG_PAGEALLOC || CONFIG_KFENCE */ |