Re: [PATCH v7 2/2] staging: rtl8723bs: Use % 4096 instead of & 0xfff
Samuel Abraham <[email protected]> Tue, 8 Apr 2025 16:44:24 +0100
| Newsgroups | dev.linux.lists.outreachy,dev.linux.lists.linux-staging,org.kernel.vger.linux-kernel |
|---|---|
| Message-ID | <CADYq+fZFRF5SLLyfG12hUJLjNk+njWyC6H34S_warp61zYv8wQ@mail.gmail.com> |
On Tue, Apr 8, 2025 at 4:12=E2=80=AFPM Andy Shevchenko <[email protected]> wr= ote: > > On Tue, Apr 08, 2025 at 01:31:42PM +0000, Abraham Samuel Adekunle wrote: > > The sequence number is constrained to a range of [0, 4095], which > > is a total of 4096 values. The bitmask operation using `& 0xfff` is > > used to perform this wrap-around. While this is functionally correct, > > it obscures the intended semantic of a 4096-based wrap. > > > > Using a modulo operation `% 4096u` makes the wrap-around logic > > explicit and easier to understand. It clearly signals that the > > sequence number cycles through a range of 4096 values. > > It also makes the code robust against potential changes of the 4096 > > upper limit, especially when it becomes a non power of 2 value while > > power-of-2 > > > the AND(&) works solely for power of 2 values. > > power-of-2 > > > The use of `% 4096u` also guarantees that the modulo operation is > > performed with unsigned arithmetic, preventing potential issues with > > the signed types. > > Reviewed-by: Andy Shevchenko <[email protected]> Thank you, Andy for your patience with me and guidance and the review. I have sent the updated patch. Adekunle.