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mm/vmalloc: separate put pages and flush VM flags
commit4f6ec86023
upstream. When VM_MAP_PUT_PAGES was added, it was defined with the same value as VM_FLUSH_RESET_PERMS. This doesn't seem like it will cause any big functional problems other than some excess flushing for VM_MAP_PUT_PAGES allocations. Redefine VM_MAP_PUT_PAGES to have its own value. Also, rearrange things so flags are less likely to be missed in the future. Link: https://lkml.kernel.org/r/20210122233706.9304-1-rick.p.edgecombe@intel.com Fixes:b944afc9d6
("mm: add a VM_MAP_PUT_PAGES flag for vmap") Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com> Suggested-by: Matthew Wilcox <willy@infradead.org> Cc: Miaohe Lin <linmiaohe@huawei.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Daniel Axtens <dja@axtens.net> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 2 additions and 7 deletions
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@ -24,7 +24,8 @@ struct notifier_block; /* in notifier.h */
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#define VM_UNINITIALIZED 0x00000020 /* vm_struct is not fully initialized */
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#define VM_NO_GUARD 0x00000040 /* don't add guard page */
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#define VM_KASAN 0x00000080 /* has allocated kasan shadow memory */
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#define VM_MAP_PUT_PAGES 0x00000100 /* put pages and free array in vfree */
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#define VM_FLUSH_RESET_PERMS 0x00000100 /* reset direct map and flush TLB on unmap, can't be freed in atomic context */
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#define VM_MAP_PUT_PAGES 0x00000200 /* put pages and free array in vfree */
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/*
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* VM_KASAN is used slighly differently depending on CONFIG_KASAN_VMALLOC.
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@ -37,12 +38,6 @@ struct notifier_block; /* in notifier.h */
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* determine which allocations need the module shadow freed.
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*/
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/*
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* Memory with VM_FLUSH_RESET_PERMS cannot be freed in an interrupt or with
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* vfree_atomic().
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*/
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#define VM_FLUSH_RESET_PERMS 0x00000100 /* Reset direct map and flush TLB on unmap */
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/* bits [20..32] reserved for arch specific ioremap internals */
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/*
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