Kenerl Entry/Exit optimization patch for your bk tree

DISCUSSION Bjorn Helgaas 1 participant 1 message Jul 30, 2003

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Bjorn Helgaas

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2003-07-30 22:13 UTC #0 lore raw

Quoted 8 lines · Rohit

Please find attached the Kernel entry/exit patch against your latest 2.4.20-bk tree. This is derived from (now settled) 2.5 kernel patch that David has in his tree. One major change from 2.5 is that ia64_execve still has the same old hack to support IA-32 apps (that is currently broken on 2.5).
This patch also has the support for 16-bytes instructions that are mentioned in SDM2.1

I applied this patch to the 2.4 tree, with the following edit:

arch/ia64/kernel/entry.h Wed Jul 30 16:51:44 2003 +1 -1

diff -Nru a/arch/ia64/kernel/entry.h b/arch/ia64/kernel/entry.h
@@ -14,7 +14,7 @@
 #define SW(f)          (IA64_SWITCH_STACK_##f##_OFFSET)
 
 #define PT_REGS_SAVES(off)                     \
-       .unwabi @svr4, 'i';                     \
+       .unwabi 3, 'i';                         \
        .fframe IA64_PT_REGS_SIZE+16+(off);     \
        .spillsp rp, PT(CR_IIP)+16+(off);       \
        .spillsp ar.pfs, PT(CR_IFS)+16+(off);   \