riscv/purgatory: add asm/purgatory.h

Add arch/riscv/include/asm/purgatory.h and provide the purgatory()
prototype via the architecture header, mirroring the x86 layout.

Remove the workaround from arch/riscv/purgatory/purgatory.c.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://patch.msgid.link/20260509073850.44595-4-thorsten.blum@linux.dev
[pjw@kernel.org: drop superfluous extern in header file]
Signed-off-by: Paul Walmsley <pjw@kernel.org>

diff --git a/arch/riscv/include/asm/purgatory.h b/arch/riscv/include/asm/purgatory.h
new file mode 100644 (file)
index 0000000..5a827e6
--- /dev/null
+++ b/arch/riscv/include/asm/purgatory.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_RISCV_PURGATORY_H
+#define _ASM_RISCV_PURGATORY_H
+
+#ifndef __ASSEMBLER__
+#include <linux/purgatory.h>
+
+void purgatory(void);
+#endif /* __ASSEMBLER__ */
+
+#endif /* _ASM_RISCV_PURGATORY_H */

diff --git a/arch/riscv/purgatory/purgatory.c b/arch/riscv/purgatory/purgatory.c
index 745deeb6e3a5f9fcb7d0382970be73a28abd91a2..3474e3abe5d78a6a8755966592ff2cf08b3a0076 100644 (file)
--- a/arch/riscv/purgatory/purgatory.c
+++ b/arch/riscv/purgatory/purgatory.c
@@ -8,9 +8,9 @@
  *
  */
 
-#include <linux/purgatory.h>
 #include <linux/kernel.h>
 #include <linux/string.h>
+#include <asm/purgatory.h>
 #include <asm/string.h>
 
 u8 purgatory_sha256_digest[SHA256_DIGEST_SIZE] __section(".kexec-purgatory");
@@ -32,9 +32,6 @@ static bool verify_sha256_digest(void)
        return memcmp(digest, purgatory_sha256_digest, sizeof(digest)) == 0;
 }
 
-/* workaround for a warning with -Wmissing-prototypes */
-void purgatory(void);
-
 void purgatory(void)
 {
        if (!verify_sha256_digest())