diff options
Diffstat (limited to 'arch/arm/kernel/traps.c')
| -rw-r--r-- | arch/arm/kernel/traps.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index 056b2a9f1be8..0330a4058e1d 100644 --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -437,7 +437,7 @@ static int bad_syscall(int n, struct pt_regs *regs) return regs->ARM_r0; } -static inline void +static void do_cache_op(unsigned long start, unsigned long end, int flags) { struct mm_struct *mm = current->active_mm; @@ -532,6 +532,22 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs) #endif return 0; +#ifdef CONFIG_UNOFFICIAL_USER_DMA_API + /* + * These are temporary interfaces; they are a stop gap until we get + * a proper solution to DMA. These won't always work for every + * device. Only use these IF you *really* know what you're doing. + * Don't be surprised if they go away in later kernels. + */ + case NR(temp_dma_inv_range): + case NR(temp_dma_clean_range): + case NR(temp_dma_flush_range): + { + extern int temp_user_dma_op(unsigned long, unsigned long, int); + return temp_user_dma_op(regs->ARM_r0, regs->ARM_r1, no & 3); + } +#endif + #ifdef CONFIG_NEEDS_SYSCALL_FOR_CMPXCHG /* * Atomically store r1 in *r2 if *r2 is equal to r0 for user space. |