diff options
| author | David Woodhouse <dwmw2@shinybook.infradead.org> | 2005-07-27 14:14:13 +0100 |
|---|---|---|
| committer | David Woodhouse <dwmw2@shinybook.infradead.org> | 2005-07-27 14:14:13 +0100 |
| commit | c5fbc3966f48279dbebfde10248c977014aa9988 (patch) | |
| tree | 0a52f645d89f91952c26b215f460a4ba195ca42c /arch/i386/kernel/process.c | |
| parent | 39299d9d15c41cbdd7c7009967cd35afaf34d8fa (diff) | |
| parent | 9e566d8bd61f939b7f5d7d969f5b178571471cf9 (diff) | |
Merge with master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Diffstat (limited to 'arch/i386/kernel/process.c')
| -rw-r--r-- | arch/i386/kernel/process.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/arch/i386/kernel/process.c b/arch/i386/kernel/process.c index ba243a4cc119..d9492058aaf3 100644 --- a/arch/i386/kernel/process.c +++ b/arch/i386/kernel/process.c @@ -700,23 +700,27 @@ struct task_struct fastcall * __switch_to(struct task_struct *prev_p, struct tas /* * Restore %fs and %gs if needed. + * + * Glibc normally makes %fs be zero, and %gs is one of + * the TLS segments. */ - if (unlikely(prev->fs | prev->gs | next->fs | next->gs)) { + if (unlikely(prev->fs | next->fs)) loadsegment(fs, next->fs); + + if (prev->gs | next->gs) loadsegment(gs, next->gs); - } /* * Now maybe reload the debug registers */ if (unlikely(next->debugreg[7])) { - set_debugreg(current->thread.debugreg[0], 0); - set_debugreg(current->thread.debugreg[1], 1); - set_debugreg(current->thread.debugreg[2], 2); - set_debugreg(current->thread.debugreg[3], 3); + set_debugreg(next->debugreg[0], 0); + set_debugreg(next->debugreg[1], 1); + set_debugreg(next->debugreg[2], 2); + set_debugreg(next->debugreg[3], 3); /* no 4 and 5 */ - set_debugreg(current->thread.debugreg[6], 6); - set_debugreg(current->thread.debugreg[7], 7); + set_debugreg(next->debugreg[6], 6); + set_debugreg(next->debugreg[7], 7); } if (unlikely(prev->io_bitmap_ptr || next->io_bitmap_ptr)) |