Please apply commit 93bd4a80efeb to v6.6.y and v6.12.y

Please apply commit 93bd4a80efeb to v6.6.y and v6.12.y

[Guenter Roeck]

Hi Greg,

v6.6.y and v6.12.y fail to build corenet64_smp_defconfig.

powerpc64-linux-ld: arch/powerpc/kernel/irq_64.o: in function `__replay_soft_interrupts':
/opt/buildbot/slave/qemu-ppc64/build/arch/powerpc/kernel/irq_64.c:119:(.text+0x50): undefined reference to `ppc_save_regs'

This is caused by the backport of upstream commit 497b7794aef0 ("powerpc:
do not build ppc_save_regs.o always"). That commit made some wrong
assumptions and causes the build failure.

Please apply commit 93bd4a80efeb ("powerpc/kernel: Fix ppc_save_regs
inclusion in build") to both branches to fix the problem.

Thanks,
Guenter

---
bisect:

# bad: [a5df3a702b2cba82bcfb066fa9f5e4a349c33924] Linux 6.6.96
# good: [c2603c511feb427b2b09f74b57816a81272932a1] Linux 6.6.93
git bisect start 'HEAD' 'c2603c511feb'
# bad: [36318ff3d6bf94ea01b2caa0967f2b366c7daea6] media: venus: Fix probe error handling
git bisect bad 36318ff3d6bf94ea01b2caa0967f2b366c7daea6
# bad: [c64a16344c5258dcaaa6caf2bbe2298e6e3e469c] randstruct: gcc-plugin: Remove bogus void member
git bisect bad c64a16344c5258dcaaa6caf2bbe2298e6e3e469c
# bad: [cb4b9369463eb6f6d0f4bdeaf35d183a935c2573] Use thread-safe function pointer in libbpf_print
git bisect bad cb4b9369463eb6f6d0f4bdeaf35d183a935c2573
# bad: [aa7b90057bc3f8d9ddf50e7397facdd613de5610] x86/mtrr: Check if fixed-range MTRRs exist in mtrr_save_fixed_ranges()
git bisect bad aa7b90057bc3f8d9ddf50e7397facdd613de5610
# good: [cb1e26f53e598a3946dd9b3014d6bcddd8609a47] crypto: sun8i-ss - do not use sg_dma_len before calling DMA functions
git bisect good cb1e26f53e598a3946dd9b3014d6bcddd8609a47
# bad: [5810e9d402c43a63c16ce949f9d9ff59fe6832e7] crypto: sun8i-ce - move fallback ahash_request to the end of the struct
git bisect bad 5810e9d402c43a63c16ce949f9d9ff59fe6832e7
# bad: [3cf4d9cae4356c2a0610d82c13c957e4a88d6d94] crypto: marvell/cesa - Avoid empty transfer descriptor
git bisect bad 3cf4d9cae4356c2a0610d82c13c957e4a88d6d94
# bad: [ce167ff4cd172bb85b834d671f37151b0f7f734a] x86/microcode/AMD: Do not return error when microcode update is not necessary
git bisect bad ce167ff4cd172bb85b834d671f37151b0f7f734a
# bad: [4fb22310892c9bba3a170d0873e95886fbadf064] powerpc/crash: Fix non-smp kexec preparation
git bisect bad 4fb22310892c9bba3a170d0873e95886fbadf064
# bad: [fdc39b3ad8a7791792408212507683bfae9f2dc5] powerpc: do not build ppc_save_regs.o always
git bisect bad fdc39b3ad8a7791792408212507683bfae9f2dc5
# first bad commit: [fdc39b3ad8a7791792408212507683bfae9f2dc5] powerpc: do not build ppc_save_regs.o always

Re: Please apply commit 93bd4a80efeb to v6.6.y and v6.12.y

[Greg Kroah-Hartman]

On Mon, Jul 07, 2025 at 03:43:36PM -0700, Guenter Roeck wrote:
> Hi Greg,
> 
> v6.6.y and v6.12.y fail to build corenet64_smp_defconfig.
> 
> powerpc64-linux-ld: arch/powerpc/kernel/irq_64.o: in function `__replay_soft_interrupts':
> /opt/buildbot/slave/qemu-ppc64/build/arch/powerpc/kernel/irq_64.c:119:(.text+0x50): undefined reference to `ppc_save_regs'
> 
> This is caused by the backport of upstream commit 497b7794aef0 ("powerpc:
> do not build ppc_save_regs.o always"). That commit made some wrong
> assumptions and causes the build failure.
> 
> Please apply commit 93bd4a80efeb ("powerpc/kernel: Fix ppc_save_regs
> inclusion in build") to both branches to fix the problem.

Now applied, thanks.

greg k-h