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![]() This type will be used when setting up a new vma in an f_ops->mmap() hook. Using a separate type from VmaRef allows us to have a separate set of operations that you are only able to use during the mmap() hook. For example, the VM_MIXEDMAP flag must not be changed after the initial setup that happens during the f_ops->mmap() hook. To avoid setting invalid flag values, the methods for clearing VM_MAYWRITE and similar involve a check of VM_WRITE, and return an error if VM_WRITE is set. Trying to use `try_clear_maywrite` without checking the return value results in a compilation error because the `Result` type is marked #[must_use]. For now, there's only a method for VM_MIXEDMAP and not VM_PFNMAP. When we add a VM_PFNMAP method, we will need some way to prevent you from setting both VM_MIXEDMAP and VM_PFNMAP on the same vma. Link: https://lkml.kernel.org/r/20250408-vma-v16-6-d8b446e885d9@google.com Signed-off-by: Alice Ryhl <aliceryhl@google.com> Acked-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Acked-by: Liam R. Howlett <Liam.Howlett@Oracle.com> Reviewed-by: Jann Horn <jannh@google.com> Reviewed-by: Andreas Hindborg <a.hindborg@kernel.org> Cc: Alex Gaynor <alex.gaynor@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Balbir Singh <balbirs@nvidia.com> Cc: Benno Lossin <benno.lossin@proton.me> Cc: Björn Roy Baron <bjorn3_gh@protonmail.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Gary Guo <gary@garyguo.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Trevor Gross <tmgross@umich.edu> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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alloc | ||
block | ||
fs | ||
list | ||
mm | ||
net | ||
sync | ||
time | ||
.gitignore | ||
alloc.rs | ||
block.rs | ||
build_assert.rs | ||
cred.rs | ||
device_id.rs | ||
device.rs | ||
devres.rs | ||
dma.rs | ||
driver.rs | ||
error.rs | ||
faux.rs | ||
firmware.rs | ||
fs.rs | ||
generated_arch_static_branch_asm.rs.S | ||
init.rs | ||
io.rs | ||
ioctl.rs | ||
jump_label.rs | ||
kunit.rs | ||
lib.rs | ||
list.rs | ||
miscdevice.rs | ||
mm.rs | ||
net.rs | ||
of.rs | ||
page.rs | ||
pci.rs | ||
pid_namespace.rs | ||
platform.rs | ||
prelude.rs | ||
print.rs | ||
rbtree.rs | ||
revocable.rs | ||
security.rs | ||
seq_file.rs | ||
sizes.rs | ||
static_assert.rs | ||
std_vendor.rs | ||
str.rs | ||
sync.rs | ||
task.rs | ||
time.rs | ||
tracepoint.rs | ||
transmute.rs | ||
types.rs | ||
uaccess.rs | ||
workqueue.rs |