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| author |   Christophe Leroy <christophe.leroy@c-s.fr> | 2019-01-31 10:09:00 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2019-02-23 22:31:40 +1100 |
| commit | a7916a1de526162d73e894b6d3ebd895d4302078 (patch) | |
| tree | d34624a17b6475cc0e45bafdde2c6d51b6a70626 /arch/powerpc/kernel/asm-offsets.c | |
| parent | powerpc: Activate CONFIG_THREAD_INFO_IN_TASK (diff) | |
| download | linux-dev-a7916a1de526162d73e894b6d3ebd895d4302078.tar.xz linux-dev-a7916a1de526162d73e894b6d3ebd895d4302078.zip | |
powerpc: regain entire stack space
thread_info is not anymore in the stack, so the entire stack
can now be used.
There is also no risk anymore of corrupting task_cpu(p) with a
stack overflow so the patch removes the test.
When doing this, an explicit test for NULL stack pointer is
needed in validate_sp() as it is not anymore implicitely covered
by the sizeof(thread_info) gap.
In the meantime, with the previous patch all pointers to the stacks
are not anymore pointers to thread_info so this patch changes them
to void*
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/asm-offsets.c')
| -rw-r--r-- | arch/powerpc/kernel/asm-offsets.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index ca3fb836cbb9..1ad0cbcc5f13 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -92,7 +92,6 @@ int main(void) DEFINE(SIGSEGV, SIGSEGV); DEFINE(NMI_MASK, NMI_MASK); #else - DEFINE(THREAD_INFO_GAP, _ALIGN_UP(sizeof(struct thread_info), 16)); OFFSET(KSP_LIMIT, thread_struct, ksp_limit); #ifdef CONFIG_PPC_RTAS OFFSET(RTAS_SP, thread_struct, rtas_sp); |