https://bugzilla.kernel.org/show_bug.cgi?id=215389
--- Comment #6 from Erhard F. (erhar...@mailbox.org) --- Created attachment 300318 --> https://bugzilla.kernel.org/attachment.cgi?id=300318&action=edit bisect.log Ok, finally got it. Interesting find: # git bisect bad db972a3787d12b1ce9ba7a31ec376d8a79e04c47 is the first bad commit commit db972a3787d12b1ce9ba7a31ec376d8a79e04c47 Author: Christophe Leroy <christophe.le...@csgroup.eu> Date: Tue Dec 8 05:24:19 2020 +0000 powerpc/powermac: Fix low_sleep_handler with CONFIG_VMAP_STACK low_sleep_handler() can't restore the context from standard stack because the stack can hardly be accessed with MMU OFF. Store everything in a global storage area instead of storing a pointer to the stack in that global storage area. To avoid a complete churn of the function, still use r1 as the pointer to the storage area during restore. Fixes: cd08f109e262 ("powerpc/32s: Enable CONFIG_VMAP_STACK") Reported-by: Giuseppe Sacco <giuse...@sguazz.it> Signed-off-by: Christophe Leroy <christophe.le...@csgroup.eu> Tested-by: Giuseppe Sacco <giuse...@sguazz.it> Signed-off-by: Michael Ellerman <m...@ellerman.id.au> Link: https://lore.kernel.org/r/e3e0d8042a3ba75cb4a9546c19c408b5b5b28994.1607404931.git.christophe.le...@csgroup.eu arch/powerpc/platforms/Kconfig.cputype | 2 +- arch/powerpc/platforms/powermac/sleep.S | 132 ++++++++++++++------------------ 2 files changed, 60 insertions(+), 74 deletions(-) -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
