On Mon, 09 Apr 2007 18:22:22 +0400
Maxim Uvarov <[email protected]> wrote:
> --- linux-2.6.21-rc5.orig/arch/x86_64/kernel/entry.S
> +++ linux-2.6.21-rc5/arch/x86_64/kernel/entry.S
> @@ -236,6 +236,11 @@ ENTRY(system_call)
> movq %r10,%rcx
> call *sys_call_table(,%rax,8) # XXX: rip relative
> movq %rax,RAX-ARGOFFSET(%rsp)
> +#ifdef CONFIG_THREAD_PERF_STAT_SYSC
> + GET_THREAD_INFO(%rcx)
> + addq $1, threadinfo_sysc_cnt(%rcx) # Increment syscalls counter
> +#endif /* CONFIG_THREAD_PERF_STAT_SYSC */
> +
Please reorganize the code so that you dont duplicate GET_THREAD_INFO() stuff
You can do this for example before calling the syscall, not after.
ja badsys
+#ifdef CONFIG_THREAD_PERF_STAT_SYSC
+ incq threadinfo_sysc_cnt(%rcx) # Increment syscalls counter
+#endif /* CONFIG_THREAD_PERF_STAT_SYSC */
movq %r10,%rcx
call *sys_call_table(,%rax,8) # XXX: rip relative
-
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