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entry: Rename arch_check_user_regs() to arch_enter_from_user_mode()

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arch_check_user_regs() is used at the moment to verify that struct pt_regs
contains valid values when entering the kernel from userspace. s390 needs
a place in the generic entry code to modify a cpu data structure when
switching from userspace to kernel mode. As arch_check_user_regs() is
exactly this, rename it to arch_enter_from_user_mode().

When entering the kernel from userspace, arch_check_user_regs() is
used to verify that struct pt_regs contains valid values. Note that
the NMI codepath doesn't call this function. s390 needs a place in the
generic entry code to modify a cpu data structure when switching from
userspace to kernel mode. As arch_check_user_regs() is exactly this,
rename it to arch_enter_from_user_mode().

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20220504062351.2954280-2-tmricht@linux.ibm.com
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Sven Schnelle
2022-05-04 08:23:50 +02:00
committed by Heiko Carstens
parent fcdc03f78d
commit 6d97af487d
4 changed files with 9 additions and 9 deletions
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8
include/linux/entry-common.h
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@@ -63,7 +63,7 @@
ARCH_EXIT_TO_USER_MODE_WORK)
/**
* arch_check_user_regs - Architecture specific sanity check for user mode regs
* arch_enter_from_user_mode - Architecture specific sanity check for user mode regs
* @regs: Pointer to currents pt_regs
*
* Defaults to an empty implementation. Can be replaced by architecture
@@ -73,10 +73,10 @@
* section. Use __always_inline so the compiler cannot push it out of line
* and make it instrumentable.
*/
static __always_inline void arch_check_user_regs(struct pt_regs *regs);
static __always_inline void arch_enter_from_user_mode(struct pt_regs *regs);
#ifndef arch_check_user_regs
static __always_inline void arch_check_user_regs(struct pt_regs *regs) {}
#ifndef arch_enter_from_user_mode
static __always_inline void arch_enter_from_user_mode(struct pt_regs *regs) {}
#endif
/**