| 1 | // sgrep |
| 2 | |
| 3 | // Case 1: search for irq functions where interrupt.h is not used |
| 4 | // these might be ok as is, because some definitions of request_irq still |
| 5 | // have the pt_regs parameter in the signature |
| 6 | |
| 7 | @ rule1 @ |
| 8 | @@ |
| 9 | |
| 10 | #include <linux/interrupt.h> |
| 11 | |
| 12 | @ rule2 depends on !rule1 @ |
| 13 | expression irq; |
| 14 | identifier handler; |
| 15 | expression irqflags; |
| 16 | expression devname; |
| 17 | expression dev_id; |
| 18 | @@ |
| 19 | |
| 20 | request_irq(irq, handler, irqflags, devname, dev_id) |
| 21 | |
| 22 | @@ |
| 23 | identifier rule2.handler, irq, dev, regs; |
| 24 | @@ |
| 25 | |
| 26 | * handler(int irq, void *dev, struct pt_regs *regs) |
| 27 | { ... } |
| 28 | |
| 29 | // ---------------------------------------------------------------------- |
| 30 | |
| 31 | // Case 2: the function is not static. This only works when there is no |
| 32 | // static handler function in the file, but fortunately this is the case |
| 33 | // (we have detected this by actually doing the transformation, which makes |
| 34 | // the second rule no longer match; unfortunately there is no disjunction |
| 35 | // at the function level) |
| 36 | |
| 37 | @ rule3 depends on rule1 @ |
| 38 | expression irq; |
| 39 | identifier handler; |
| 40 | expression irqflags; |
| 41 | expression devname; |
| 42 | expression dev_id; |
| 43 | @@ |
| 44 | |
| 45 | request_irq(irq, handler, irqflags, devname, dev_id) |
| 46 | |
| 47 | @ rule4 @ |
| 48 | typedef irqreturn_t; |
| 49 | identifier rule3.handler, irq, dev, regs; |
| 50 | @@ |
| 51 | |
| 52 | static irqreturn_t handler(int irq, void *dev, struct pt_regs *regs) |
| 53 | { ... } |
| 54 | |
| 55 | @ rule5 depends on !rule4 @ |
| 56 | identifier rule3.handler, irq, dev, regs; |
| 57 | @@ |
| 58 | |
| 59 | * handler(int irq, void *dev, struct pt_regs *regs) |
| 60 | { ... } |
| 61 | |
| 62 | // ---------------------------------------------------------------------- |
| 63 | |
| 64 | // Case 3: the code contains a reference to the regs parameter |
| 65 | |
| 66 | @@ |
| 67 | identifier rule3.handler, irq, dev, regs; |
| 68 | int E; |
| 69 | @@ |
| 70 | |
| 71 | handler(int irq, void *dev, struct pt_regs *regs) |
| 72 | { |
| 73 | <... |
| 74 | ( |
| 75 | handle_irq(E,regs) |
| 76 | | |
| 77 | * regs |
| 78 | ) |
| 79 | ...> |
| 80 | } |