[PATCH 1/3] riscv: Use _stext not _text to denote the start of kernel code

[Ard Biesheuvel <ardb+git@google.com>]

From: Ard Biesheuvel <ardb@kernel.org>

On RISC-V, _text and _stext currently refer to the same location, i.e.,
the start of the .text output section, which follows the image header
(.head.text) emitted by HEAD_TEXT_SECTION. _start is the symbol that
refers to the actual start of the image.

On most other architectures, _text refers to the start of the image, and
_stext to the start of the kernel code, and generic code (such as the
EFI stub) may start relying on this distinction.

So switch the only user of _text in arch/riscv, i.e., the "Kernel code"
resource that is exposed via /proc/iomem (and from which the "Kernel
image" resource inherits its start address), over to _stext. This is a
no-op given that both symbols currently resolve to the same address, but
it permits _text to be moved to the start of the image, making it an
alias of _start.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 arch/riscv/kernel/setup.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index d79f99b86033..e6112d424fde 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -91,7 +91,7 @@ static int __init add_kernel_resources(void)
 	 * child nodes.
 	 */
 
-	code_res.start = __pa_symbol(_text);
+	code_res.start = __pa_symbol(_stext);
 	code_res.end = __pa_symbol(_etext) - 1;
 	code_res.flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
 
-- 
2.56.0.611.g1030f0b940-goog