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ARM: obtain thread info structure later 

Obtain the thread info structure later in the syscall processing, so
that we free up a register for earlier code.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Russell King 2017-03-24 16:19:12 +00:00
parent 309ee04257
commit da594e3fff
1 changed files with 2 additions and 1 deletions
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3
arch/arm/kernel/entry-common.S
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@ -152,7 +152,6 @@ ENTRY(vector_swi)
alignment_trap r10, ip, __cr_alignment
enable_irq
ct_user_exit
get_thread_info tsk
/*
* Get the system call number.
@ -209,6 +208,7 @@ ENTRY(vector_swi)
bic scno, scno, #0xff000000 @ mask off SWI op-code
eor scno, scno, #__NR_SYSCALL_BASE @ check OS number
#endif
get_thread_info tsk
local_restart:
ldr r10, [tsk, #TI_FLAGS] @ check for syscall tracing
@ -240,6 +240,7 @@ local_restart:
9001:
sub lr, saved_pc, #4
str lr, [sp, #S_PC]
get_thread_info tsk
b ret_fast_syscall
#endif
ENDPROC(vector_swi)