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| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-09-09 22:03:42 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-09-30 22:53:18 -0400 |
| commit | cba1ec7e88a0257eb13e84d170a93cd52b702562 (patch) | |
| tree | 8a79d3ac38463e3610c5f18481d07bda1e39d45b /arch/alpha/kernel/entry.S | |
| parent | 756144f8ea2e4fccbbf1a5644f3e1e889a48f765 (diff) | |
| download | talos-obmc-linux-cba1ec7e88a0257eb13e84d170a93cd52b702562.tar.gz talos-obmc-linux-cba1ec7e88a0257eb13e84d170a93cd52b702562.zip | |
alpha: switch to generic kernel_thread()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/alpha/kernel/entry.S')
| -rw-r--r-- | arch/alpha/kernel/entry.S | 57 |
1 files changed, 10 insertions, 47 deletions
diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S index 61ff145cab6e..421dccf273eb 100644 --- a/arch/alpha/kernel/entry.S +++ b/arch/alpha/kernel/entry.S @@ -609,59 +609,22 @@ ret_from_fork: .end ret_from_fork /* - * kernel_thread(fn, arg, clone_flags) + * ... and new kernel threads - here */ .align 4 - .globl kernel_thread - .ent kernel_thread -kernel_thread: - /* We can be called from a module. */ - ldgp $gp, 0($27) - .prologue 1 - subq $sp, SP_OFF+6*8, $sp - br $1, 2f /* load start address */ - - /* We've now "returned" from a fake system call. */ - unop - blt $0, 1f /* error? */ - ldi $1, 0x3fff - beq $20, 1f /* parent or child? */ - - bic $sp, $1, $8 /* in child. */ - jsr $26, ($27) + .globl ret_from_kernel_thread + .ent ret_from_kernel_thread +ret_from_kernel_thread: + mov $17, $16 + jsr $26, schedule_tail + mov $9, $27 + mov $10, $16 + jsr $26, ($9) ldgp $gp, 0($26) mov $0, $16 mov $31, $26 jmp $31, sys_exit - -1: ret /* in parent. */ - - .align 4 -2: /* Fake a system call stack frame, as we can't do system calls - from kernel space. Note that we store FN and ARG as they - need to be set up in the child for the call. Also store $8 - and $26 for use in the parent. */ - stq $31, SP_OFF($sp) /* ps */ - stq $1, SP_OFF+8($sp) /* pc */ - stq $gp, SP_OFF+16($sp) /* gp */ - stq $16, 136($sp) /* $27; FN for child */ - stq $17, SP_OFF+24($sp) /* $16; ARG for child */ - stq $8, 64($sp) /* $8 */ - stq $26, 128($sp) /* $26 */ - /* Avoid the HAE being gratuitously wrong, to avoid restoring it. */ - ldq $2, alpha_mv+HAE_CACHE - stq $2, 152($sp) /* HAE */ - - /* Shuffle FLAGS to the front; add CLONE_VM. */ - ldi $1, CLONE_VM|CLONE_UNTRACED - or $18, $1, $16 - bsr $26, sys_clone - - /* We don't actually care for a3 success widgetry in the kernel. - Not for positive errno values. */ - stq $0, 0($sp) /* $0 */ - br ret_to_kernel -.end kernel_thread +.end ret_from_kernel_thread /* |
