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| author | Jiri Kosina <jkosina@suse.com> | 2025-01-20 09:58:12 +0100 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.com> | 2025-01-20 09:58:12 +0100 |
| commit | 670af65d2ab4a6a9bb72f014b080757e291ad3fe (patch) | |
| tree | d54ccf4ba52fa9f15ed8f1de6214edc53e1502be /rust/kernel/page.rs | |
| parent | HID: hid-asus: Disable OOBE mode on the ProArt P16 (diff) | |
| parent | HID: roccat: pyro: constify 'struct bin_attribute' (diff) | |
| download | linux-670af65d2ab4a6a9bb72f014b080757e291ad3fe.tar.gz linux-670af65d2ab4a6a9bb72f014b080757e291ad3fe.zip | |
Merge branch 'for-6.14/constify-bin-attribute' into for-linus
- constification of 'struct bin_attribute' in various HID driver (Thomas Weißschuh)
Diffstat (limited to 'rust/kernel/page.rs')
| -rw-r--r-- | rust/kernel/page.rs | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/rust/kernel/page.rs b/rust/kernel/page.rs index 208a006d587c..fdac6c375fe4 100644 --- a/rust/kernel/page.rs +++ b/rust/kernel/page.rs @@ -20,6 +20,16 @@ pub const PAGE_SIZE: usize = bindings::PAGE_SIZE; /// A bitmask that gives the page containing a given address. pub const PAGE_MASK: usize = !(PAGE_SIZE - 1); +/// Round up the given number to the next multiple of [`PAGE_SIZE`]. +/// +/// It is incorrect to pass an address where the next multiple of [`PAGE_SIZE`] doesn't fit in a +/// [`usize`]. +pub const fn page_align(addr: usize) -> usize { + // Parentheses around `PAGE_SIZE - 1` to avoid triggering overflow sanitizers in the wrong + // cases. + (addr + (PAGE_SIZE - 1)) & PAGE_MASK +} + /// A pointer to a page that owns the page allocation. /// /// # Invariants |