On 2021-12-21 1:45 p.m., Rolf Eike Beer wrote:
Am Dienstag, 21. Dezember 2021, 19:33:16 CET schrieb John David Anglin:
Fix mask used to select futex spinlock.
The address bits used to select the futex spinlock need to match those used
in the LWS code in syscall.S. The mask 0x3f8 only selects 7 bits. It
should select 8 bits.
This change looks like this should become a helper macro or something like
that so the code will stay in sync. Can the mask be shared with the LWS code
with a constant while at it so it will also include that?
I understand the point but it's rather convoluted. We would need a macro for the assembly
code. Then the macro would need to be embedded in an asm for C. Then, there's the shift
for the int* type in the C code.
I am proposing to rewrite this code so the spinlock pointer is only computed once, but Helge
wanted a change that could be easily back ported.
Dave
--
John David Anglin dave.anglin@xxxxxxxx
