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author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-10 17:57:48 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-10 17:57:48 -0700 |
commit | 5b8b9d0c6d0e0f1993c6c56deaf9646942c49d94 (patch) | |
tree | eaf00472d34b1f690eea209a2bcfb8e30f53a5b7 /arch/x86/mm/init_32.c | |
parent | ca6151a9788e2cbb1a7b5d320dcf4f16a3b64477 (diff) | |
parent | 89163f93c6f969da5811af5377cc10173583123b (diff) | |
download | linux-5b8b9d0c6d0e0f1993c6c56deaf9646942c49d94.tar.bz2 |
Merge branch 'akpm' (patches from Andrew)
Merge yet more updates from Andrew Morton:
- Almost all of the rest of MM (memcg, slab-generic, slab, pagealloc,
gup, hugetlb, pagemap, memremap)
- Various other things (hfs, ocfs2, kmod, misc, seqfile)
* akpm: (34 commits)
ipc/util.c: sysvipc_find_ipc() should increase position index
kernel/gcov/fs.c: gcov_seq_next() should increase position index
fs/seq_file.c: seq_read(): add info message about buggy .next functions
drivers/dma/tegra20-apb-dma.c: fix platform_get_irq.cocci warnings
change email address for Pali Rohár
selftests: kmod: test disabling module autoloading
selftests: kmod: fix handling test numbers above 9
docs: admin-guide: document the kernel.modprobe sysctl
fs/filesystems.c: downgrade user-reachable WARN_ONCE() to pr_warn_once()
kmod: make request_module() return an error when autoloading is disabled
mm/memremap: set caching mode for PCI P2PDMA memory to WC
mm/memory_hotplug: add pgprot_t to mhp_params
powerpc/mm: thread pgprot_t through create_section_mapping()
x86/mm: introduce __set_memory_prot()
x86/mm: thread pgprot_t through init_memory_mapping()
mm/memory_hotplug: rename mhp_restrictions to mhp_params
mm/memory_hotplug: drop the flags field from struct mhp_restrictions
mm/special: create generic fallbacks for pte_special() and pte_mkspecial()
mm/vma: introduce VM_ACCESS_FLAGS
mm/vma: define a default value for VM_DATA_DEFAULT_FLAGS
...
Diffstat (limited to 'arch/x86/mm/init_32.c')
-rw-r--r-- | arch/x86/mm/init_32.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c index de73992b8432..4222a010057a 100644 --- a/arch/x86/mm/init_32.c +++ b/arch/x86/mm/init_32.c @@ -257,7 +257,8 @@ static inline int __is_kernel_text(unsigned long addr) unsigned long __init kernel_physical_mapping_init(unsigned long start, unsigned long end, - unsigned long page_size_mask) + unsigned long page_size_mask, + pgprot_t prot) { int use_pse = page_size_mask == (1<<PG_LEVEL_2M); unsigned long last_map_addr = end; @@ -819,12 +820,24 @@ void __init mem_init(void) #ifdef CONFIG_MEMORY_HOTPLUG int arch_add_memory(int nid, u64 start, u64 size, - struct mhp_restrictions *restrictions) + struct mhp_params *params) { unsigned long start_pfn = start >> PAGE_SHIFT; unsigned long nr_pages = size >> PAGE_SHIFT; + int ret; - return __add_pages(nid, start_pfn, nr_pages, restrictions); + /* + * The page tables were already mapped at boot so if the caller + * requests a different mapping type then we must change all the + * pages with __set_memory_prot(). + */ + if (params->pgprot.pgprot != PAGE_KERNEL.pgprot) { + ret = __set_memory_prot(start, nr_pages, params->pgprot); + if (ret) + return ret; + } + + return __add_pages(nid, start_pfn, nr_pages, params); } void arch_remove_memory(int nid, u64 start, u64 size, |