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authorMatt Mackall <mpm@selenic.com>2006-01-08 01:05:26 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-08 20:14:11 -0800
commit64ca9004b819ab87648dbfc78f3ef49ee491343e (patch)
tree9b5daef5280800a0006343a17f63072658d91a1d /arch/i386
parent708e9a794cf8822b760edaccd9053edb07c34d19 (diff)
[PATCH] Make vm86 support optional
This adds an option to remove vm86 support under CONFIG_EMBEDDED. Saves about 5k. This version eliminates most of the #ifdefs of the previous version and instead uses function stubs in vm86.h. Also, release_vm86_irqs is moved from asm-i386/irq.h to a more appropriate home in vm86.h so that the stubs can live together. $ size vmlinux-baseline vmlinux-novm86 text data bss dec hex filename 2920821 523232 190652 3634705 377611 vmlinux-baseline 2916268 523100 190492 3629860 376324 vmlinux-novm86 Signed-off-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386')
-rw-r--r--arch/i386/kernel/Makefile3
-rw-r--r--arch/i386/kernel/entry.S2
-rw-r--r--arch/i386/kernel/process.c1
3 files changed, 5 insertions, 1 deletions
diff --git a/arch/i386/kernel/Makefile b/arch/i386/kernel/Makefile
index 4f40589e179..be1880bb75b 100644
--- a/arch/i386/kernel/Makefile
+++ b/arch/i386/kernel/Makefile
@@ -4,7 +4,7 @@
extra-y := head.o init_task.o vmlinux.lds
-obj-y := process.o semaphore.o signal.o entry.o traps.o irq.o vm86.o \
+obj-y := process.o semaphore.o signal.o entry.o traps.o irq.o \
ptrace.o time.o ioport.o ldt.o setup.o i8259.o sys_i386.o \
pci-dma.o i386_ksyms.o i387.o dmi_scan.o bootflag.o \
quirks.o i8237.o
@@ -34,6 +34,7 @@ obj-$(CONFIG_ACPI_SRAT) += srat.o
obj-$(CONFIG_HPET_TIMER) += time_hpet.o
obj-$(CONFIG_EFI) += efi.o efi_stub.o
obj-$(CONFIG_DOUBLEFAULT) += doublefault.o
+obj-$(CONFIG_VM86) += vm86.o
obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
EXTRA_AFLAGS := -traditional
diff --git a/arch/i386/kernel/entry.S b/arch/i386/kernel/entry.S
index 607c0600750..4d704724b2f 100644
--- a/arch/i386/kernel/entry.S
+++ b/arch/i386/kernel/entry.S
@@ -323,6 +323,7 @@ work_notifysig: # deal with pending signals and
ALIGN
work_notifysig_v86:
+#ifdef CONFIG_VM86
pushl %ecx # save ti_flags for do_notify_resume
call save_v86_state # %eax contains pt_regs pointer
popl %ecx
@@ -330,6 +331,7 @@ work_notifysig_v86:
xorl %edx, %edx
call do_notify_resume
jmp resume_userspace
+#endif
# perform syscall exit tracing
ALIGN
diff --git a/arch/i386/kernel/process.c b/arch/i386/kernel/process.c
index 45e7f0ac4b0..035928f3f6c 100644
--- a/arch/i386/kernel/process.c
+++ b/arch/i386/kernel/process.c
@@ -48,6 +48,7 @@
#include <asm/processor.h>
#include <asm/i387.h>
#include <asm/desc.h>
+#include <asm/vm86.h>
#ifdef CONFIG_MATH_EMULATION
#include <asm/math_emu.h>
#endif