From: Guo Ren guoren@linux.alibaba.com
[ Upstream commit 84814460eef9af0fb56a4698341c9cb7996a6312 ]
6184358da000 ("riscv: Fixup static_obj() fail") attempted to elide a lockdep failure by rearranging our kernel image to place all initdata within [_stext, _end], thus triggering lockdep to treat these as static objects. These objects are released and eventually reallocated, causing check_kernel_text_object() to trigger a BUG().
This backs out the change to make [_stext, _end] all-encompassing, instead just moving initdata. This results in initdata being outside of [__init_begin, __init_end], which means initdata can't be freed.
Link: https://lore.kernel.org/linux-riscv/1593266228-61125-1-git-send-email-guoren... Signed-off-by: Guo Ren guoren@linux.alibaba.com Reported-by: Aurelien Jarno aurelien@aurel32.net Tested-by: Aurelien Jarno aurelien@aurel32.net [Palmer: Clean up commit text] Signed-off-by: Palmer Dabbelt palmerdabbelt@google.com Signed-off-by: Sasha Levin sashal@kernel.org --- arch/riscv/kernel/vmlinux.lds.S | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/riscv/kernel/vmlinux.lds.S b/arch/riscv/kernel/vmlinux.lds.S index f3586e31ed1ec..34d00d9e6eac0 100644 --- a/arch/riscv/kernel/vmlinux.lds.S +++ b/arch/riscv/kernel/vmlinux.lds.S @@ -22,13 +22,11 @@ SECTIONS /* Beginning of code and text segment */ . = LOAD_OFFSET; _start = .; - _stext = .; HEAD_TEXT_SECTION . = ALIGN(PAGE_SIZE);
__init_begin = .; INIT_TEXT_SECTION(PAGE_SIZE) - INIT_DATA_SECTION(16) . = ALIGN(8); __soc_early_init_table : { __soc_early_init_table_start = .; @@ -55,6 +53,7 @@ SECTIONS . = ALIGN(SECTION_ALIGN); .text : { _text = .; + _stext = .; TEXT_TEXT SCHED_TEXT CPUIDLE_TEXT @@ -67,6 +66,8 @@ SECTIONS _etext = .; }
+ INIT_DATA_SECTION(16) + /* Start of data section */ _sdata = .; RO_DATA(SECTION_ALIGN)