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SubjectRe: [PATCH] riscv: Drop setup_initrd
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On Aug 28 2018, Guenter Roeck <linux@roeck-us.net> wrote:

> On Tue, Aug 28, 2018 at 01:10:20PM -0700, Palmer Dabbelt wrote:
>> On Thu, 09 Aug 2018 21:11:40 PDT (-0700), linux@roeck-us.net wrote:
>> >setup_initrd() does not appear to serve a practical purpose other than
>> >preventing qemu boots with "-initrd" parameter, so let's drop it.
>> >
>> >Signed-off-by: Guenter Roeck <linux@roeck-us.net>
>> >---
>> > arch/riscv/kernel/setup.c | 39 ---------------------------------------
>> > 1 file changed, 39 deletions(-)
>> >
>> >diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
>> >index 2e56af3281f8..579f58a42974 100644
>> >--- a/arch/riscv/kernel/setup.c
>> >+++ b/arch/riscv/kernel/setup.c
>> >@@ -82,41 +82,6 @@ EXPORT_SYMBOL(empty_zero_page);
>> > /* The lucky hart to first increment this variable will boot the other cores */
>> > atomic_t hart_lottery;
>> >
>> >-#ifdef CONFIG_BLK_DEV_INITRD
>> >-static void __init setup_initrd(void)
>> >-{
>> >- extern char __initramfs_start[];
>> >- extern unsigned long __initramfs_size;
>> >- unsigned long size;
>> >-
>> >- if (__initramfs_size > 0) {
>> >- initrd_start = (unsigned long)(&__initramfs_start);
>> >- initrd_end = initrd_start + __initramfs_size;
>> >- }
>
> The underlying problem is probably that __initramfs_size == 512 even
> if there is no embedded initrd. Result is that initrd_start and initrd_end
> are always overwritten, even if provided and even if there is no embedded
> initrd. Result is that initrd_start and initrd_end are always overwritten,
> and -initrd from the qemu command line is always ignored.
>
> A less invasive fix than mine would be
>
> - if (__initramfs_size > 0) {
> + if (__initramfs_size > 0 && !initrd_start) {
>
> Any chance you can test that with your setup ?

You should just delete the last four lines above. They serve no purpose.

Andreas.

--
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1
"And now for something completely different."

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