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authorMark Rutland <mark.rutland@arm.com>2019-01-03 13:23:10 +0000
committerWill Deacon <will.deacon@arm.com>2019-01-03 18:03:41 +0000
commit8c2c596f8f453ffa6ef3bf14abc48a86b5431e56 (patch)
tree43bf056d288125414f961d5949ee5e13fbe0fea0 /arch
parent1236cd2bad8bc9038af90830cf017c770fdba03c (diff)
downloadlinux-8c2c596f8f453ffa6ef3bf14abc48a86b5431e56.tar.gz
arm64: entry: remove unused register aliases
In commit: 3b7142752e4bee15 ("arm64: convert native/compat syscall entry to C") ... we moved the syscall invocation code from assembly to C, but left behind a number of register aliases which are now unused. Let's remove them before they confuse someone. Cc: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Dave Martin <Dave.Martin@arm.com> Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm64/kernel/entry.S12
1 files changed, 1 insertions, 11 deletions
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index 763f03dc4d9e..0ec0c46b2c0c 100644
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -392,17 +392,7 @@ alternative_insn eret, nop, ARM64_UNMAP_KERNEL_AT_EL0
mov sp, x19
.endm
-/*
- * These are the registers used in the syscall handler, and allow us to
- * have in theory up to 7 arguments to a function - x0 to x6.
- *
- * x7 is reserved for the system call number in 32-bit mode.
- */
-wsc_nr .req w25 // number of system calls
-xsc_nr .req x25 // number of system calls (zero-extended)
-wscno .req w26 // syscall number
-xscno .req x26 // syscall number (zero-extended)
-stbl .req x27 // syscall table pointer
+/* GPRs used by entry code */
tsk .req x28 // current thread_info
/*