Andreas Schwab wrote:
Maxim Kuvyrkov <maxim@xxxxxxxxxxxxxxxx> writes:
diff --git a/arch/m68k/include/asm/unistd.h b/arch/m68k/include/asm/unistd.h
index aa29a86..619677c 100644
--- a/arch/m68k/include/asm/unistd.h
+++ b/arch/m68k/include/asm/unistd.h
@@ -335,9 +335,16 @@
#define __NR_preadv 329
#define __NR_pwritev 330
+/* Private syscalls. */
+#define __M68K_NR_read_tp 0xffffffff
+#define __M68K_NR_write_tp 0xfffffffe
+#define __M68K_NR_atomic_cmpxchg_32 0xfffffffd
+#define __M68K_NR_atomic_barrier 0xfffffffc
I don't see the need for these weird syscall numbers.
The need would be (a) use numbers that are very unlikely to used for
normal syscalls, and (b) using -1..-4 for the syscall numbers works out
quite nicely for the code in entry.S. It adds just a couple of
instructions to the execution path.
Do you think it's better to assign different numbers to the
m68k-specific syscall?
--
Maxim
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