diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2022-11-27 22:49:39 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-12-02 17:54:09 +1100 |
| commit | 4cefb0f6c555971b3e6544a9b15470f9d1f12089 (patch) | |
| tree | 8d4fd01066bd2c48828ee6053991dce4cdce7440 /arch/powerpc/include/asm | |
| parent | edbd0387f3249cc7e102f86d4852a9a9f3bb1305 (diff) | |
| download | linux-4cefb0f6c555971b3e6544a9b15470f9d1f12089.tar.bz2 | |
powerpc: split validate_sp into two functions
Most callers just want to validate an arbitrary kernel stack pointer,
some need a particular size. Make the size case the exceptional one
with an extra function.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221127124942.1665522-15-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/processor.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h index 631802999d59..e96c9b8c2a60 100644 --- a/arch/powerpc/include/asm/processor.h +++ b/arch/powerpc/include/asm/processor.h @@ -374,9 +374,18 @@ static inline unsigned long __pack_fe01(unsigned int fpmode) #endif -/* Check that a certain kernel stack pointer is valid in task_struct p */ -int validate_sp(unsigned long sp, struct task_struct *p, - unsigned long nbytes); +/* + * Check that a certain kernel stack pointer is a valid (minimum sized) + * stack frame in task_struct p. + */ +int validate_sp(unsigned long sp, struct task_struct *p); + +/* + * validate the stack frame of a particular minimum size, used for when we are + * looking at a certain object in the stack beyond the minimum. + */ +int validate_sp_size(unsigned long sp, struct task_struct *p, + unsigned long nbytes); /* * Prefetch macros. |