diff options
| author | Brian Gerst <brgerst@gmail.com> | 2023-07-21 12:10:15 -0400 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2023-10-05 10:06:42 +0200 |
| commit | 0d3109ad2e6125add5b3c88e8de3fb7bfd4e8c49 (patch) | |
| tree | 1cd8a25a44400156019c1eff4f0bfc43d17f7741 | |
| parent | eec62f61e134d6711f98d4005c6439f24d03d54f (diff) | |
x86/entry/32: Convert do_fast_syscall_32() to bool return type
Doesn't have to be 'long' - this simplifies the code a bit.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230721161018.50214-5-brgerst@gmail.com
| -rw-r--r-- | arch/x86/entry/common.c | 10 | ||||
| -rw-r--r-- | arch/x86/entry/entry_32.S | 2 | ||||
| -rw-r--r-- | arch/x86/entry/entry_64_compat.S | 2 | ||||
| -rw-r--r-- | arch/x86/include/asm/syscall.h | 4 |
4 files changed, 9 insertions, 9 deletions
diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c index 328990dd8632..f1f3bf150b57 100644 --- a/arch/x86/entry/common.c +++ b/arch/x86/entry/common.c @@ -193,8 +193,8 @@ static noinstr bool __do_fast_syscall_32(struct pt_regs *regs) return true; } -/* Returns 0 to return using IRET or 1 to return using SYSEXIT/SYSRETL. */ -__visible noinstr long do_fast_syscall_32(struct pt_regs *regs) +/* Returns true to return using SYSEXIT/SYSRETL, or false to use IRET */ +__visible noinstr bool do_fast_syscall_32(struct pt_regs *regs) { /* * Called using the internal vDSO SYSENTER/SYSCALL32 calling @@ -212,7 +212,7 @@ __visible noinstr long do_fast_syscall_32(struct pt_regs *regs) /* Invoke the syscall. If it failed, keep it simple: use IRET. */ if (!__do_fast_syscall_32(regs)) - return 0; + return false; #ifdef CONFIG_X86_64 /* @@ -245,8 +245,8 @@ __visible noinstr long do_fast_syscall_32(struct pt_regs *regs) #endif } -/* Returns 0 to return using IRET or 1 to return using SYSEXIT/SYSRETL. */ -__visible noinstr long do_SYSENTER_32(struct pt_regs *regs) +/* Returns true to return using SYSEXIT/SYSRETL, or false to use IRET */ +__visible noinstr bool do_SYSENTER_32(struct pt_regs *regs) { /* SYSENTER loses RSP, but the vDSO saved it in RBP. */ regs->sp = regs->bp; diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S index 6e6af42e044a..c73047bf9f4b 100644 --- a/arch/x86/entry/entry_32.S +++ b/arch/x86/entry/entry_32.S @@ -837,7 +837,7 @@ SYM_FUNC_START(entry_SYSENTER_32) movl %esp, %eax call do_SYSENTER_32 - testl %eax, %eax + testb %al, %al jz .Lsyscall_32_done STACKLEAK_ERASE diff --git a/arch/x86/entry/entry_64_compat.S b/arch/x86/entry/entry_64_compat.S index b16272395f1a..27c05d08558a 100644 --- a/arch/x86/entry/entry_64_compat.S +++ b/arch/x86/entry/entry_64_compat.S @@ -212,7 +212,7 @@ SYM_INNER_LABEL(entry_SYSCALL_compat_after_hwframe, SYM_L_GLOBAL) sysret32_from_system_call: /* XEN PV guests always use IRET path */ - ALTERNATIVE "testl %eax, %eax; jz swapgs_restore_regs_and_return_to_usermode", \ + ALTERNATIVE "testb %al, %al; jz swapgs_restore_regs_and_return_to_usermode", \ "jmp swapgs_restore_regs_and_return_to_usermode", X86_FEATURE_XENPV /* diff --git a/arch/x86/include/asm/syscall.h b/arch/x86/include/asm/syscall.h index 4fb36fba4b5a..c7e25c940f1a 100644 --- a/arch/x86/include/asm/syscall.h +++ b/arch/x86/include/asm/syscall.h @@ -131,7 +131,7 @@ void do_syscall_64(struct pt_regs *regs, int nr); #endif /* CONFIG_X86_32 */ void do_int80_syscall_32(struct pt_regs *regs); -long do_fast_syscall_32(struct pt_regs *regs); -long do_SYSENTER_32(struct pt_regs *regs); +bool do_fast_syscall_32(struct pt_regs *regs); +bool do_SYSENTER_32(struct pt_regs *regs); #endif /* _ASM_X86_SYSCALL_H */ |