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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-23 19:55:51 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-07-23 19:55:51 -0700 |
| commit | 141769851cb73e8f986e9ed83129cde3b645288d (patch) | |
| tree | 53bc1d8115e160df0ba1e315ca0ee7c858a01a53 /arch/powerpc/mm/pgtable-radix.c | |
| parent | 1bb90cf0462c9a07cb428e9dd9665041fe7f9e18 (diff) | |
| parent | 520eccdfe187591a51ea9ab4c1a024ae4d0f68d9 (diff) | |
Merge 4.13-rc2 into usb-next
We want the USB fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/powerpc/mm/pgtable-radix.c')
| -rw-r--r-- | arch/powerpc/mm/pgtable-radix.c | 28 |
1 files changed, 23 insertions, 5 deletions
diff --git a/arch/powerpc/mm/pgtable-radix.c b/arch/powerpc/mm/pgtable-radix.c index 8c13e4282308..5cc50d47ce3f 100644 --- a/arch/powerpc/mm/pgtable-radix.c +++ b/arch/powerpc/mm/pgtable-radix.c @@ -112,10 +112,9 @@ set_the_pte: } #ifdef CONFIG_STRICT_KERNEL_RWX -void radix__mark_rodata_ro(void) +void radix__change_memory_range(unsigned long start, unsigned long end, + unsigned long clear) { - unsigned long start = (unsigned long)_stext; - unsigned long end = (unsigned long)__init_begin; unsigned long idx; pgd_t *pgdp; pud_t *pudp; @@ -125,7 +124,8 @@ void radix__mark_rodata_ro(void) start = ALIGN_DOWN(start, PAGE_SIZE); end = PAGE_ALIGN(end); // aligns up - pr_devel("marking ro start %lx, end %lx\n", start, end); + pr_debug("Changing flags on range %lx-%lx removing 0x%lx\n", + start, end, clear); for (idx = start; idx < end; idx += PAGE_SIZE) { pgdp = pgd_offset_k(idx); @@ -147,11 +147,29 @@ void radix__mark_rodata_ro(void) if (!ptep) continue; update_the_pte: - radix__pte_update(&init_mm, idx, ptep, _PAGE_WRITE, 0, 0); + radix__pte_update(&init_mm, idx, ptep, clear, 0, 0); } radix__flush_tlb_kernel_range(start, end); } + +void radix__mark_rodata_ro(void) +{ + unsigned long start, end; + + start = (unsigned long)_stext; + end = (unsigned long)__init_begin; + + radix__change_memory_range(start, end, _PAGE_WRITE); +} + +void radix__mark_initmem_nx(void) +{ + unsigned long start = (unsigned long)__init_begin; + unsigned long end = (unsigned long)__init_end; + + radix__change_memory_range(start, end, _PAGE_EXEC); +} #endif /* CONFIG_STRICT_KERNEL_RWX */ static inline void __meminit print_mapping(unsigned long start, |