diff options
| author | Chris Metcalf <cmetcalf@tilera.com> | 2010-10-14 14:42:58 -0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@tilera.com> | 2010-10-14 14:42:58 -0400 |
| commit | d6f0f22c3c409f9ed88e64f881f8308730be76f0 (patch) | |
| tree | 5521d78679fd3441cecdfe5a273eeca81aee922f /arch/tile/kernel/intvec_32.S | |
| parent | 5592840ba83c281b4df45345863b224bb290020c (diff) | |
arch/tile: update some comments to clarify register usage.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/kernel/intvec_32.S')
| -rw-r--r-- | arch/tile/kernel/intvec_32.S | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/tile/kernel/intvec_32.S b/arch/tile/kernel/intvec_32.S index 7c7e9ac2580d..c62c2f421ef3 100644 --- a/arch/tile/kernel/intvec_32.S +++ b/arch/tile/kernel/intvec_32.S | |||
| @@ -1553,6 +1553,8 @@ STD_ENTRY(_sys_clone) | |||
| 1553 | * to be available to it on entry. It does not modify any callee-save | 1553 | * to be available to it on entry. It does not modify any callee-save |
| 1554 | * registers (including "lr"). It does not check what PL it is being | 1554 | * registers (including "lr"). It does not check what PL it is being |
| 1555 | * called at, so you'd better not call it other than at PL0. | 1555 | * called at, so you'd better not call it other than at PL0. |
| 1556 | * The <atomic.h> wrapper assumes it only clobbers r20-r29, so if | ||
| 1557 | * it ever is necessary to use more registers, be aware. | ||
| 1556 | * | 1558 | * |
| 1557 | * It does not use the stack, but since it might be re-interrupted by | 1559 | * It does not use the stack, but since it might be re-interrupted by |
| 1558 | * a page fault which would assume the stack was valid, it does | 1560 | * a page fault which would assume the stack was valid, it does |