lkml.org 
[lkml]   [2010]   [Feb]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    Date
    From
    Subject[PATCH 1/3] xen: Remove unnecessary arch specific xen irq functions.
    From: Eric W. Biederman <ebiederm@xmission.com>


    Right now xen's use of the x86 and ia64 handle_irq is just bizarre and very
    fragile as it is very non-obvious the function exists and is is used by
    code out in drivers/.... Luckily using handle_irq is completly unnecessary,
    and we can just use the generic irq apis instead.

    This still leaves drivers/xen/events.c as a problematic user of the generic
    irq apis it has "static struct irq_info irq_info[NR_IRQS]" but that can be
    fixed some other time.

    Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
    ---
    arch/ia64/include/asm/xen/events.h | 4 ----
    drivers/xen/events.c | 8 ++++++--
    2 files changed, 6 insertions(+), 6 deletions(-)

    Index: linux-2.6/arch/ia64/include/asm/xen/events.h
    ===================================================================
    --- linux-2.6.orig/arch/ia64/include/asm/xen/events.h
    +++ linux-2.6/arch/ia64/include/asm/xen/events.h
    @@ -36,10 +36,6 @@ static inline int xen_irqs_disabled(stru
    return !(ia64_psr(regs)->i);
    }

    -static inline void handle_irq(int irq, struct pt_regs *regs)
    -{
    - __do_IRQ(irq);
    -}
    #define irq_ctx_init(cpu) do { } while (0)

    #endif /* _ASM_IA64_XEN_EVENTS_H */
    Index: linux-2.6/drivers/xen/events.c
    ===================================================================
    --- linux-2.6.orig/drivers/xen/events.c
    +++ linux-2.6/drivers/xen/events.c
    @@ -649,9 +649,13 @@ void xen_evtchn_do_upcall(struct pt_regs
    int bit_idx = __ffs(pending_bits);
    int port = (word_idx * BITS_PER_LONG) + bit_idx;
    int irq = evtchn_to_irq[port];
    + struct irq_desc *desc;

    - if (irq != -1)
    - handle_irq(irq, regs);
    + if (irq != -1) {
    + desc = irq_to_desc(irq);
    + if (desc)
    + generic_handle_irq_desc(irq, desc);
    + }
    }
    }


    \
     
     \ /
      Last update: 2010-02-18 03:53    [W:0.021 / U:30.708 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site