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| author | Xin Li (Intel) <xin@zytor.com> | 2024-03-04 11:33:33 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-03-07 13:55:36 +0300 |
| commit | c416b5bac6ad6ffe21e36225553b82ff2ec1558c (patch) | |
| tree | 46827e73fce51e923a6015cd74b7fe1904f91577 /io_uring/timeout.h | |
| parent | e13841907b8fda0ae0ce1ec03684665f578416a8 (diff) | |
| download | linux-c416b5bac6ad6ffe21e36225553b82ff2ec1558c.tar.xz | |
x86/fred: Fix init_task thread stack pointer initialization
As TOP_OF_KERNEL_STACK_PADDING was defined as 0 on x86_64, it went
unnoticed that the initialization of the .sp field in INIT_THREAD and some
calculations in the low level startup code do not take the padding into
account.
FRED enabled kernels require a 16 byte padding, which means that the init
task initialization and the low level startup code use the wrong stack
offset.
Subtract TOP_OF_KERNEL_STACK_PADDING in all affected places to adjust for
this.
Fixes: 65c9cc9e2c14 ("x86/fred: Reserve space for the FRED stack frame")
Fixes: 3adee777ad0d ("x86/smpboot: Remove initial_stack on 64-bit")
Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Xin Li (Intel) <xin@zytor.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Closes: https://lore.kernel.org/oe-lkp/202402262159.183c2a37-lkp@intel.com
Link: https://lore.kernel.org/r/20240304083333.449322-1-xin@zytor.com
Diffstat (limited to 'io_uring/timeout.h')
0 files changed, 0 insertions, 0 deletions