This reverts commit b0b3b2c78ec075cec4721986a95abbbac8c3da4f.
Otherwise, direct kernel boot with initramfs no longer works in QEMU.
It's broken in some bizarre way because a valid initramfs is not
recognized anymore:
Found initrd at 0xc000000001f70000:0xc000000003d61d64
rootfs image is not initramfs (XZ-compressed data is corrupt); looks like an
initrd
The issue is observed on v5.13-rc3 if the kernel is built with
defconfig, GCC 7.5.0 and GNU ld 2.32.0.
Cc: Christophe Leroy <christophe.le...@csgroup.eu>
Reported-by: Anastasia Kovaleva <a.koval...@yadro.com>
Signed-off-by: Roman Bolshakov <r.bolsha...@yadro.com>
---
arch/powerpc/Kconfig | 1 -
arch/powerpc/include/asm/jump_label.h | 21 +++++++++++++++------
arch/powerpc/kernel/jump_label.c | 4 ++--
3 files changed, 17 insertions(+), 9 deletions(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 088dd2afcfe4..59e0d55ee01d 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -189,7 +189,6 @@ config PPC
select HAVE_ARCH_HUGE_VMALLOC if HAVE_ARCH_HUGE_VMAP
select HAVE_ARCH_HUGE_VMAP if PPC_BOOK3S_64 &&
PPC_RADIX_MMU
select HAVE_ARCH_JUMP_LABEL
- select HAVE_ARCH_JUMP_LABEL_RELATIVE
select HAVE_ARCH_KASAN if PPC32 && PPC_PAGE_SHIFT <= 14
select HAVE_ARCH_KASAN_VMALLOC if PPC32 && PPC_PAGE_SHIFT <= 14
select HAVE_ARCH_KFENCE if PPC32
diff --git a/arch/powerpc/include/asm/jump_label.h
b/arch/powerpc/include/asm/jump_label.h
index 2d5c6bec2b4f..09297ec9fa52 100644
--- a/arch/powerpc/include/asm/jump_label.h
+++ b/arch/powerpc/include/asm/jump_label.h
@@ -20,8 +20,7 @@ static __always_inline bool arch_static_branch(struct
static_key *key, bool bran
asm_volatile_goto("1:\n\t"
"nop # arch_static_branch\n\t"
".pushsection __jump_table, \"aw\"\n\t"
- ".long 1b - ., %l[l_yes] - .\n\t"
- JUMP_ENTRY_TYPE "%c0 - .\n\t"
+ JUMP_ENTRY_TYPE "1b, %l[l_yes], %c0\n\t"
".popsection \n\t"
: : "i" (&((char *)key)[branch]) : : l_yes);
@@ -35,8 +34,7 @@ static __always_inline bool arch_static_branch_jump(struct
static_key *key, bool
asm_volatile_goto("1:\n\t"
"b %l[l_yes] # arch_static_branch_jump\n\t"
".pushsection __jump_table, \"aw\"\n\t"
- ".long 1b - ., %l[l_yes] - .\n\t"
- JUMP_ENTRY_TYPE "%c0 - .\n\t"
+ JUMP_ENTRY_TYPE "1b, %l[l_yes], %c0\n\t"
".popsection \n\t"
: : "i" (&((char *)key)[branch]) : : l_yes);
@@ -45,12 +43,23 @@ static __always_inline bool arch_static_branch_jump(struct
static_key *key, bool
return true;
}
+#ifdef CONFIG_PPC64
+typedef u64 jump_label_t;
+#else
+typedef u32 jump_label_t;
+#endif
+
+struct jump_entry {
+ jump_label_t code;
+ jump_label_t target;
+ jump_label_t key;
+};
+
#else
#define ARCH_STATIC_BRANCH(LABEL, KEY) \
1098: nop; \
.pushsection __jump_table, "aw"; \
- .long 1098b - ., LABEL - .; \
- FTR_ENTRY_LONG KEY; \
+ FTR_ENTRY_LONG 1098b, LABEL, KEY; \
.popsection
#endif
diff --git a/arch/powerpc/kernel/jump_label.c b/arch/powerpc/kernel/jump_label.c
index ce87dc5ea23c..144858027fa3 100644
--- a/arch/powerpc/kernel/jump_label.c
+++ b/arch/powerpc/kernel/jump_label.c
@@ -11,10 +11,10 @@
void arch_jump_label_transform(struct jump_entry *entry,
enum jump_label_type type)
{
- struct ppc_inst *addr = (struct ppc_inst *)jump_entry_code(entry);
+ struct ppc_inst *addr = (struct ppc_inst *)(unsigned long)entry->code;
if (type == JUMP_LABEL_JMP)
- patch_branch(addr, jump_entry_target(entry), 0);
+ patch_branch(addr, entry->target, 0);
else
patch_instruction(addr, ppc_inst(PPC_INST_NOP));
}
--
2.31.1
