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    Subject[PATCH AUTOSEL 5.10 50/56] parisc: Bump 64-bit IRQ stack size to 64 KB
    Date
    From: John David Anglin <dave.anglin@bell.net>

    [ Upstream commit 31680c1d1595a59e17c14ec036b192a95f8e5f4a ]

    Bump 64-bit IRQ stack size to 64 KB.

    I had a kernel IRQ stack overflow on the mx3210 debian buildd machine. This patch increases the
    64-bit IRQ stack size to 64 KB. The 64-bit stack size needs to be larger than the 32-bit stack
    size since registers are twice as big.

    Signed-off-by: John David Anglin <dave.anglin@bell.net>
    Signed-off-by: Helge Deller <deller@gmx.de>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    arch/parisc/kernel/irq.c | 4 ++++
    1 file changed, 4 insertions(+)

    diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
    index e76c866199493..60f5829d476f5 100644
    --- a/arch/parisc/kernel/irq.c
    +++ b/arch/parisc/kernel/irq.c
    @@ -376,7 +376,11 @@ static inline int eirr_to_irq(unsigned long eirr)
    /*
    * IRQ STACK - used for irq handler
    */
    +#ifdef CONFIG_64BIT
    +#define IRQ_STACK_SIZE (4096 << 4) /* 64k irq stack size */
    +#else
    #define IRQ_STACK_SIZE (4096 << 3) /* 32k irq stack size */
    +#endif

    union irq_stack_union {
    unsigned long stack[IRQ_STACK_SIZE/sizeof(unsigned long)];
    --
    2.27.0
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