diff options
author | Chris Metcalf <cmetcalf@tilera.com> | 2011-05-02 14:50:06 -0400 |
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committer | Chris Metcalf <cmetcalf@tilera.com> | 2011-05-02 18:53:35 -0400 |
commit | 313ce674d3cbc2d48ed34a9462427920ac54f4ad (patch) | |
tree | 7478150a1268c79851f1a366158c59606330e700 /arch/tile/kernel/single_step.c | |
parent | 93013a0f533fb3dd6875ca670d8e0bb4166a796e (diff) |
arch/tile: support TIF_NOTIFY_RESUME
This support is required for CONFIG_KEYS, NFSv4 kernel DNS, etc.
The change is slightly more complex than the minimal thing, since
I took advantage of having to go into the assembly code to just
move a bunch of stuff into C code: specifically, the schedule(),
do_async_page_fault(), do_signal(), and single_step_once() support,
in addition to the TIF_NOTIFY_RESUME support.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/kernel/single_step.c')
-rw-r--r-- | arch/tile/kernel/single_step.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/tile/kernel/single_step.c b/arch/tile/kernel/single_step.c index 84a729e06ec..86df5a239b7 100644 --- a/arch/tile/kernel/single_step.c +++ b/arch/tile/kernel/single_step.c @@ -318,6 +318,14 @@ void single_step_once(struct pt_regs *regs) " .popsection\n" ); + /* + * Enable interrupts here to allow touching userspace and the like. + * The callers expect this: do_trap() already has interrupts + * enabled, and do_work_pending() handles functions that enable + * interrupts internally. + */ + local_irq_enable(); + if (state == NULL) { /* allocate a page of writable, executable memory */ state = kmalloc(sizeof(struct single_step_state), GFP_KERNEL); |