| commit | 616498813b11ffefe1ed36b9f2e4fd2cdbd22f15 | [log] [tgz] |
|---|---|---|
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | Wed Apr 24 12:58:39 2013 +0200 |
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | Fri Apr 26 09:07:05 2013 +0200 |
| tree | 1748b3171ab5cf1ada0c0bbeef285352c37edfcd | |
| parent | dc7ee00d4771b3218b10e09e1071ee6eb176d381 [diff] |
s390: system call path micro optimization Add a pointer to the system call table to the thread_info structure. The TIF_31BIT bit is set or cleared by SET_PERSONALITY exactly once for the lifetime of a process. With the pointer to the correct system call table in thread_info the system call code in entry64.S path can drop the check for TIF_31BIT which saves a couple of instructions. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>