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| author | Robert Morris <[email protected]> | 2019-07-20 10:17:26 -0400 |
|---|---|---|
| committer | Robert Morris <[email protected]> | 2019-07-20 10:17:26 -0400 |
| commit | 3333665ab68329543d6c51a1d819dc56e1b7cd5d (patch) | |
| tree | 02f05df9bc4aee380285f7009eecd582bb207954 /kernel | |
| parent | 2418ac380ca52429de50b801ab18568e93a53394 (diff) | |
| download | xv6-labs-3333665ab68329543d6c51a1d819dc56e1b7cd5d.tar.gz xv6-labs-3333665ab68329543d6c51a1d819dc56e1b7cd5d.tar.bz2 xv6-labs-3333665ab68329543d6c51a1d819dc56e1b7cd5d.zip | |
not much
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/proc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/proc.c b/kernel/proc.c index 57528f9..e63cc9f 100644 --- a/kernel/proc.c +++ b/kernel/proc.c @@ -49,7 +49,7 @@ mycpu(void) { return c; } -// Return the current struct proc *. +// Return the current struct proc *, or zero if none. struct proc* myproc(void) { push_off(); @@ -421,7 +421,7 @@ scheduler(void) c->proc = 0; for(;;){ - // Let devices interrupt when no lock is held. + // Avoid deadlock by ensuring that devices can interrupt. intr_on(); for(p = proc; p < &proc[NPROC]; p++) { |