# UnmapError in riscv::paging - Rust
An error indicating that an `unmap` call failed.
Keywords: rust, rustlang, rust-lang, UnmapError

# Enum riscv::paging::UnmapError

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    pub enum UnmapError<P: PhysicalAddress> {
        ParentEntryHugePage,
        PageNotMapped,
        InvalidFrameAddress(P),
    }

Expand description

An error indicating that an `unmap` call failed.

## Variants

### `ParentEntryHugePage`

An upper level page table entry has the `HUGE_PAGE` flag set, which means that the given page is part of a huge page and can’t be freed individually.

### `PageNotMapped`

The given page is not mapped to a physical frame.

### `InvalidFrameAddress(P)`

The page table entry for the given page points to an invalid physical address.

## Trait Implementations

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### impl<P: Debug + PhysicalAddress> Debug for UnmapError<P>

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#### fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

## Auto Trait Implementations

### impl<P> RefUnwindSafe for UnmapError<P> where
P: RefUnwindSafe,

### impl<P> Send for UnmapError<P> where
P: Send,

### impl<P> Sync for UnmapError<P> where
P: Sync,

### impl<P> Unpin for UnmapError<P> where
P: Unpin,

### impl<P> UnwindSafe for UnmapError<P> where
P: UnwindSafe,

## Blanket Implementations

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### impl<T> Any for T where
T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more

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### impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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### impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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### impl<T> From<T> for T

const: unstable · source

#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T, U> TryFrom<U> for T where
U: Into<T>,

#### type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

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### impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

#### type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.