diff options
| author | Michael Matz <matz@suse.de> | 2006-03-07 21:55:48 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-08 14:15:04 -0800 |
| commit | 2ec5e3a867d63d04932e11c6097f63760d9be3fe (patch) | |
| tree | bb3ea7b72232ec127a104c37cce0f17881ad5d28 | |
| parent | 62287fbb54b4af71dc5a4918350f81a4cd467788 (diff) | |
| download | linux-2ec5e3a867d63d04932e11c6097f63760d9be3fe.tar.gz | |
[PATCH] fix kexec asm
While testing kexec and kdump we hit problems where the new kernel would
freeze or instantly reboot. The easiest way to trigger it was to kexec a
kernel compiled for CONFIG_M586 on an athlon cpu. Compiling for CONFIG_MK7
instead would work fine.
The patch fixes a few problems with the kexec inline asm.
Signed-off-by: Chris Mason <mason@suse.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | arch/i386/kernel/machine_kexec.c | 14 | ||||
| -rw-r--r-- | arch/x86_64/kernel/machine_kexec.c | 2 | ||||
| -rw-r--r-- | include/asm-powerpc/kexec.h | 3 |
3 files changed, 10 insertions, 9 deletions
diff --git a/arch/i386/kernel/machine_kexec.c b/arch/i386/kernel/machine_kexec.c index a912fed4848273..f73d7374a2ba8d 100644 --- a/arch/i386/kernel/machine_kexec.c +++ b/arch/i386/kernel/machine_kexec.c @@ -116,13 +116,13 @@ static void load_segments(void) __asm__ __volatile__ ( "\tljmp $"STR(__KERNEL_CS)",$1f\n" "\t1:\n" - "\tmovl $"STR(__KERNEL_DS)",%eax\n" - "\tmovl %eax,%ds\n" - "\tmovl %eax,%es\n" - "\tmovl %eax,%fs\n" - "\tmovl %eax,%gs\n" - "\tmovl %eax,%ss\n" - ); + "\tmovl $"STR(__KERNEL_DS)",%%eax\n" + "\tmovl %%eax,%%ds\n" + "\tmovl %%eax,%%es\n" + "\tmovl %%eax,%%fs\n" + "\tmovl %%eax,%%gs\n" + "\tmovl %%eax,%%ss\n" + ::: "eax", "memory"); #undef STR #undef __STR } diff --git a/arch/x86_64/kernel/machine_kexec.c b/arch/x86_64/kernel/machine_kexec.c index 89fab51e20f4b4..25ac8a3faae635 100644 --- a/arch/x86_64/kernel/machine_kexec.c +++ b/arch/x86_64/kernel/machine_kexec.c @@ -140,7 +140,7 @@ static void load_segments(void) "\tmovl %0,%%ss\n" "\tmovl %0,%%fs\n" "\tmovl %0,%%gs\n" - : : "a" (__KERNEL_DS) + : : "a" (__KERNEL_DS) : "memory" ); } diff --git a/include/asm-powerpc/kexec.h b/include/asm-powerpc/kexec.h index bda2f217e6fe4a..6a2af2f6853b36 100644 --- a/include/asm-powerpc/kexec.h +++ b/include/asm-powerpc/kexec.h @@ -93,7 +93,8 @@ static inline void crash_setup_regs(struct pt_regs *newregs, "mfxer %0\n" "std %0, 296(%2)\n" : "=&r" (tmp1), "=&r" (tmp2) - : "b" (newregs)); + : "b" (newregs) + : "memory"); } } #else |