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| author |   Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-09-04 15:08:28 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2012-09-05 16:05:23 +1000 |
| commit | 636802ef96eebe279b22ad9f9dacfe29291e45c7 (patch) | |
| tree | aedbdd51b2558d9badd12cb68e5ecc4ed5823474 /arch | |
| parent | powerpc: Make sure IPI handlers see data written by IPI senders (diff) | |
| download | linux-dev-636802ef96eebe279b22ad9f9dacfe29291e45c7.tar.xz linux-dev-636802ef96eebe279b22ad9f9dacfe29291e45c7.zip | |
powerpc: Don't use __put_user() in patch_instruction
patch_instruction() can be called very early on ppc32, when the kernel
isn't yet running at it's linked address. That can cause the !
is_kernel_addr() test in __put_user() to trip and call might_sleep()
which is very bad at that point during boot.
Use a lower level function instead for now, at least until we get to
rework ppc32 boot process to do the code patching later, like ppc64
does.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/lib/code-patching.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/lib/code-patching.c b/arch/powerpc/lib/code-patching.c index dd223b3eb333..17e5b2364312 100644 --- a/arch/powerpc/lib/code-patching.c +++ b/arch/powerpc/lib/code-patching.c @@ -20,7 +20,7 @@ int patch_instruction(unsigned int *addr, unsigned int instr) { int err; - err = __put_user(instr, addr); + __put_user_size(instr, addr, 4, err); if (err) return err; asm ("dcbst 0, %0; sync; icbi 0,%0; sync; isync" : : "r" (addr)); |