Hi Wade,

On Wed, Feb 22, 2012 at 02:45:36PM +0000, Wade Farnsworth wrote:

Supplying the asm-generic/syscall.h interface is a
pre-requisite for HAVE_ARCH_TRACEHOOK

Signed-off-by: Steven Walter <redacted>
Signed-off-by: Wade Farnsworth <redacted>
---
 arch/arm/include/asm/syscall.h |   93 ++++++++++++++++++++++++++++++++++++++++
 1 files changed, 93 insertions(+), 0 deletions(-)
 create mode 100644 arch/arm/include/asm/syscall.h

[...]

+
+static inline void syscall_set_return_value(struct task_struct *task,
+					    struct pt_regs *regs,
+					    int error, long val)
+{
+	regs->ARM_r0 = (long) error ?: val;
+}

This looks like far too much fun for kernel code, although I see that '?:'
does appear elsewhere in the kernel. Usually in perl regexs though :)

Will