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| author | Geert Uytterhoeven <[email protected]> | 2024-05-15 14:03:35 +0000 |
|---|---|---|
| committer | Russell King (Oracle) <[email protected]> | 2024-05-15 20:41:08 +0000 |
| commit | eebadafc3b14d9426fa9cc3ab0da0e48367c7114 (patch) | |
| tree | 90cbeb9b3f2085bc94fbffddba0f6d561769a057 /arch/powerpc/lib/code-patching.c | |
| parent | ARM: 9382/1: ftrace: Define ftrace_stub_graph (diff) | |
| download | kernel-eebadafc3b14d9426fa9cc3ab0da0e48367c7114.tar.gz kernel-eebadafc3b14d9426fa9cc3ab0da0e48367c7114.zip | |
ARM: 9398/1: Fix userspace enter on LPAE with CC_OPTIMIZE_FOR_SIZE=y
Booting an LPAE-enabled kernel built with CONFIG_CC_OPTIMIZE_FOR_SIZE=y
fails when starting userspace:
Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000004
CPU: 1 PID: 1 Comm: init Tainted: G W N 6.9.0-rc1-koelsch-00004-g7af5b901e847 #1930
Hardware name: Generic R-Car Gen2 (Flattened Device Tree)
Call trace:
unwind_backtrace from show_stack+0x10/0x14
show_stack from dump_stack_lvl+0x78/0xa8
dump_stack_lvl from panic+0x118/0x398
panic from do_exit+0x1ec/0x938
do_exit from sys_exit_group+0x0/0x10
---[ end Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000004 ]---
Add the missing memory clobber to cpu_set_ttbcr(), as suggested by
Russell King.
Force inlining of uaccess_save_and_enable(), as suggested by Ard
Biesheuvel.
The latter fixes booting on Koelsch.
Closes: https://lore.kernel.org/r/CAMuHMdWTAJcZ9BReWNhpmsgkOzQxLNb5OhNYxzxv6D5TSh2fwQ@mail.gmail.com/
Fixes: 7af5b901e84743c6 ("ARM: 9358/2: Implement PAN for LPAE by TTBR0 page table walks disablement")
Acked-by: Ard Biesheuvel <[email protected]>
Reviewed-by: Linus Walleij <[email protected]>
Tested-by: Florian Fainelli <[email protected]>
Signed-off-by: Geert Uytterhoeven <[email protected]>
Signed-off-by: Russell King (Oracle) <[email protected]>
Diffstat (limited to 'arch/powerpc/lib/code-patching.c')
0 files changed, 0 insertions, 0 deletions