On 3/28/22 18:34, Mikulas Patocka wrote:
Early alpha processors cannot write a single byte or short; they read 8
bytes, modify the value in registers and write back 8 bytes.
This could cause race condition in the structure dm_io - if the fields
flags and io_count are modified simultaneously.
Fix this bug by using 32-bit flags if we are on Alpha and if we are
compiling for a processor that doesn't have the byte-word-extension.
Errm.
Seeing that those alphas could only modify 64 bit atomically, what
exactly do you gain by using 32-bit flags?
Shouldn't you be using 64-bit flags?
Cheers,
Hannes
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