mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 08:58:07 +00:00
e027ba1b83
Fold coalesced_mmio_has_room() into its sole caller, coalesced_mmio_write(), as it's really just a single line of code, has a goofy return value, and is unnecessarily brittle. E.g. if coalesced_mmio_has_room() were to check ring->last directly, or the caller failed to use READ_ONCE(), KVM would be susceptible to TOCTOU attacks from userspace. Opportunistically add a comment explaining why on earth KVM leaves one entry free, which may not be obvious to readers that aren't familiar with ring buffers. No functional change intended. Reviewed-by: Ilias Stamatis <ilstam@amazon.com> Cc: Paul Durrant <paul@xen.org> Link: https://lore.kernel.org/r/20240828181446.652474-3-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com> |
||
|---|---|---|
| .. | ||
| kvm | ||
| lib | ||
| Makefile | ||