ASSEMBLER в современном программировании нужен/нет?

$cd /usr/src/linux-<kernel version>
$grep -r " asm volatile" .
./arch/alpha/kernel/core_apecs.c:       asm volatile("ldl %0,%1; mb; mb" : "=r"(
value) : "m"(*(vuip)addr)
./arch/alpha/kernel/time.c:    asm volatile ("rpcc %0" : "=r"(result));
./arch/alpha/lib/fpreg.c:#define STT(reg,val)  asm volatile ("ftoit $f"#reg",%0"
 : "=r"(val));
./arch/alpha/lib/fpreg.c:#define STT(reg,val)  asm volatile ("stt $f"#reg",%0" :
 "=m"(val));
./arch/alpha/lib/fpreg.c:#define LDT(reg,val)  asm volatile ("itoft %0,$f"#reg :
 : "r"(val));
./arch/alpha/lib/fpreg.c:#define LDT(reg,val)  asm volatile ("ldt $f"#reg",%0" :
 : "m"(val));
./arch/alpha/lib/fpreg.c:#define STS(reg,val)  asm volatile ("ftois $f"#reg",%0"
 : "=r"(val));
./arch/alpha/lib/fpreg.c:#define STS(reg,val)  asm volatile ("sts $f"#reg",%0" :
 "=m"(val));
./arch/alpha/lib/fpreg.c:#define LDS(reg,val)  asm volatile ("itofs %0,$f"#reg :
 : "r"(val));
./arch/alpha/lib/fpreg.c:#define LDS(reg,val)  asm volatile ("lds $f"#reg",%0" :
 : "m"(val));
./arch/arm/boot/compressed/misc.c:              asm volatile ("mrc p14, 0, %0, c
0, c1, 0" : "=r" (status));
./arch/arm/boot/compressed/misc.c:              asm volatile ("mrc p14, 0, %0, c
14, c0, 0" : "=r" (status));
./arch/arm/boot/compressed/misc.c:              asm volatile ("mrc p14, 0, %0, c
0, c0, 0" : "=r" (status));
./arch/arm/include/asm/bug.h:   asm volatile("1:\t" BUG_INSTR_TYPE #__value "\n"
        \
./arch/arm/include/asm/bug.h:   asm volatile(BUG_INSTR_TYPE #__value);  \
./arch/arm/include/asm/cmpxchg.h:               asm volatile("@ __xchg1\n"
./arch/arm/include/asm/cmpxchg.h:               asm volatile("@ __xchg4\n"
./arch/arm/include/asm/cmpxchg.h:               asm volatile("@ __xchg1\n"
./arch/arm/include/asm/cmpxchg.h:               asm volatile("@ __xchg4\n"
./arch/arm/include/asm/cmpxchg.h:                       asm volatile("@ __cmpxch
g1\n"
./arch/arm/include/asm/cmpxchg.h:                       asm volatile("@ __cmpxch
g1\n"
./arch/arm/include/asm/cmpxchg.h:                       asm volatile("@ __cmpxch
g4\n"
./arch/arm/include/asm/cp15.h:  asm volatile("mcr p15, 0, %0, c1, c0, 0 @ set CR
"
./arch/arm/include/asm/cp15.h:  asm volatile("mcr p15, 0, %0, c1, c0, 2 @ set co
pro access"
./arch/arm/include/asm/domain.h:        asm volatile(
./arch/arm/include/asm/hardware/iop3xx.h:       asm volatile("mrc p6, 0, %0, c0,
 c1, 0" : "=r" (val));
./arch/arm/include/asm/hardware/iop3xx.h:       asm volatile("mcr p6, 0, %0, c0,
 c1, 0" : : "r" (val));
./arch/arm/include/asm/hardware/iop3xx.h:       asm volatile("mcr p6, 0, %0, c1,
 c1, 0" : : "r" (val));
./arch/arm/include/asm/hardware/iop3xx.h:       asm volatile("mrc p6, 0, %0, c2,
 c1, 0" : "=r" (val));
./arch/arm/include/asm/hardware/iop3xx.h:       asm volatile("mcr p6, 0, %0, c2,
 c1, 0" : : "r" (val));
./arch/arm/include/asm/hardware/iop3xx.h:       asm volatile("mrc p6, 0, %0, c3,
 c1, 0" : "=r" (val));
./arch/arm/include/asm/hardware/iop3xx.h:       asm volatile("mcr p6, 0, %0, c3,
 c1, 0" : : "r" (val));
./arch/arm/include/asm/hardware/iop3xx.h:       asm volatile("mcr p6, 0, %0, c4,
 c1, 0" : : "r" (val));
./arch/arm/include/asm/hardware/iop3xx.h:       asm volatile("mcr p6, 0, %0, c5,
 c1, 0" : : "r" (val));
./arch/arm/include/asm/hardware/iop3xx.h:       asm volatile("mcr p6, 0, %0, c6,
 c1, 0" : : "r" (val));
./arch/arm/include/asm/hardware/iop3xx.h:       asm volatile("mrc p6, 0, %0, c7,
 c1, 0":"=r" (val));
./arch/arm/include/asm/hardware/iop3xx.h:       asm volatile("mcr p6, 0, %0, c7,
 c1, 0"::"r" (val));
./arch/arm/include/asm/hw_breakpoint.h: asm volatile("mrc p14, 0, %0, " #N "," #
M ", " #OP2 : "=r" (VAL));\
./arch/arm/include/asm/hw_breakpoint.h: asm volatile("mcr p14, 0, %0, " #N "," #
M ", " #OP2 : : "r" (VAL));\
./arch/arm/include/asm/io.h:    asm volatile("strh %1, %0"
./arch/arm/include/asm/io.h:    asm volatile("ldrh %1, %0"
./arch/arm/include/asm/io.h:    asm volatile("strb %1, %0"
./arch/arm/include/asm/io.h:    asm volatile("str %1, %0"
./arch/arm/include/asm/io.h:    asm volatile("ldrb %1, %0"
./arch/arm/include/asm/io.h:    asm volatile("ldr %1, %0"
./arch/arm/include/asm/irqflags.h:      asm volatile(
./arch/arm/include/asm/irqflags.h:      asm volatile(
./arch/arm/include/asm/irqflags.h:      asm volatile(
./arch/arm/include/asm/irqflags.h:      asm volatile(
./arch/arm/include/asm/irqflags.h:      asm volatile(
./arch/arm/include/asm/irqflags.h:      asm volatile(
./arch/arm/include/asm/irqflags.h:      asm volatile(
./arch/arm/include/asm/irqflags.h:      asm volatile(
./arch/arm/include/asm/mtd-xip.h:#define xip_iprefetch()        do { asm volatil
e (".rep 8; nop; .endr"); } while (0)
./arch/arm/include/asm/percpu.h:        asm volatile("mcr p15, 0, %0, c13, c0, 4
" : : "r" (off) : "memory");
./arch/arm/kernel/arch_timer.c:                 asm volatile("mcr p15, 0, %0, c1
4, c2, 1" : : "r" (val));
./arch/arm/kernel/arch_timer.c:                 asm volatile("mcr p15, 0, %0, c1
4, c2, 0" : : "r" (val));
./arch/arm/kernel/arch_timer.c:                 asm volatile("mcr p15, 0, %0, c1
4, c3, 1" : : "r" (val));
./arch/arm/kernel/arch_timer.c:                 asm volatile("mcr p15, 0, %0, c1
4, c3, 0" : : "r" (val));
./arch/arm/kernel/arch_timer.c:                 asm volatile("mrc p15, 0, %0, c1
4, c2, 1" : "=r" (val));
./arch/arm/kernel/arch_timer.c:                 asm volatile("mrc p15, 0, %0, c1
4, c2, 0" : "=r" (val));
./arch/arm/kernel/arch_timer.c:                 asm volatile("mrc p15, 0, %0, c1
4, c0, 0" : "=r" (val));
./arch/arm/kernel/arch_timer.c:                 asm volatile("mrc p15, 0, %0, c1
4, c3, 1" : "=r" (val));
./arch/arm/kernel/arch_timer.c:                 asm volatile("mrc p15, 0, %0, c1
4, c3, 0" : "=r" (val));
./arch/arm/kernel/arch_timer.c:         asm volatile("mrrc p15, 0, %Q0, %R0, c14
" : "=r" (cval));
./arch/arm/kernel/arch_timer.c:         asm volatile("mrrc p15, 1, %Q0, %R0, c14
" : "=r" (cval));
./arch/arm/kernel/perf_event_v6.c:      asm volatile("mrc   p15, 0, %0, c15, c12
, 0" : "=r"(val));
./arch/arm/kernel/perf_event_v6.c:      asm volatile("mcr   p15, 0, %0, c15, c12
, 0" : : "r"(val));
./arch/arm/kernel/perf_event_v6.c:              asm volatile("mrc   p15, 0, %0,
c15, c12, 1" : "=r"(value));
./arch/arm/kernel/perf_event_v6.c:              asm volatile("mrc   p15, 0, %0,
c15, c12, 2" : "=r"(value));
./arch/arm/kernel/perf_event_v6.c:              asm volatile("mrc   p15, 0, %0,
c15, c12, 3" : "=r"(value));
./arch/arm/kernel/perf_event_v6.c:              asm volatile("mcr   p15, 0, %0,
c15, c12, 1" : : "r"(value));
./arch/arm/kernel/perf_event_v6.c:              asm volatile("mcr   p15, 0, %0,
c15, c12, 2" : : "r"(value));
./arch/arm/kernel/perf_event_v6.c:              asm volatile("mcr   p15, 0, %0,
c15, c12, 3" : : "r"(value));
./arch/arm/kernel/perf_event_v7.c:      asm volatile("mrc p15, 0, %0, c9, c12, 0
" : "=r"(val));
./arch/arm/kernel/perf_event_v7.c:      asm volatile("mcr p15, 0, %0, c9, c12, 0
" : : "r"(val));
./arch/arm/kernel/perf_event_v7.c:      asm volatile("mcr p15, 0, %0, c9, c12, 5
" : : "r" (counter));
./arch/arm/kernel/perf_event_v7.c:              asm volatile("mrc p15, 0, %0, c9
, c13, 0" : "=r" (value));
./arch/arm/kernel/perf_event_v7.c:              asm volatile("mrc p15, 0, %0, c9
, c13, 2" : "=r" (value));
./arch/arm/kernel/perf_event_v7.c:              asm volatile("mcr p15, 0, %0, c9
, c13, 0" : : "r" (value));
./arch/arm/kernel/perf_event_v7.c:              asm volatile("mcr p15, 0, %0, c9
, c13, 2" : : "r" (value));
./arch/arm/kernel/perf_event_v7.c:              asm volatile("mcr p15, 0, %0, c9
, c13, 1" : : "r" (val));
./arch/arm/kernel/perf_event_v7.c:      asm volatile("mcr p15, 0, %0, c9, c12, 1
" : : "r" (BIT(counter)));
./arch/arm/kernel/perf_event_v7.c:      asm volatile("mcr p15, 0, %0, c9, c12, 2
" : : "r" (BIT(counter)));
./arch/arm/kernel/perf_event_v7.c:      asm volatile("mcr p15, 0, %0, c9, c14, 1
" : : "r" (BIT(counter)));
./arch/arm/kernel/perf_event_v7.c:      asm volatile("mcr p15, 0, %0, c9, c14, 2
" : : "r" (BIT(counter)));
./arch/arm/kernel/perf_event_v7.c:      asm volatile("mcr p15, 0, %0, c9, c12, 3
" : : "r" (BIT(counter)));
./arch/arm/kernel/perf_event_v7.c:      asm volatile("mrc p15, 0, %0, c9, c12, 3
" : "=r" (val));
./arch/arm/kernel/perf_event_v7.c:      asm volatile("mcr p15, 0, %0, c9, c12, 3
" : : "r" (val));
./arch/arm/kernel/perf_event_v7.c:      asm volatile("mrc p15, 0, %0, c9, c12, 0
" : "=r" (val));
./arch/arm/kernel/perf_event_v7.c:      asm volatile("mrc p15, 0, %0, c9, c12, 1
" : "=r" (val));
./arch/arm/kernel/perf_event_v7.c:      asm volatile("mrc p15, 0, %0, c9, c14, 1
" : "=r" (val));
./arch/arm/kernel/perf_event_v7.c:      asm volatile("mrc p15, 0, %0, c9, c12, 3
" : "=r" (val));
./arch/arm/kernel/perf_event_v7.c:      asm volatile("mrc p15, 0, %0, c9, c12, 5
" : "=r" (val));
./arch/arm/kernel/perf_event_v7.c:      asm volatile("mrc p15, 0, %0, c9, c13, 0
" : "=r" (val));
./arch/arm/kernel/perf_event_v7.c:              asm volatile("mrc p15, 0, %0, c9
, c13, 2" : "=r" (val));
./arch/arm/kernel/perf_event_v7.c:              asm volatile("mrc p15, 0, %0, c9
, c13, 1" : "=r" (val));
./arch/arm/kernel/perf_event_xscale.c:  asm volatile("mrc p14, 0, %0, c0, c0, 0"
 : "=r" (val));
./arch/arm/kernel/perf_event_xscale.c:  asm volatile("mcr p14, 0, %0, c0, c0, 0"
 : : "r" (val));
./arch/arm/kernel/perf_event_xscale.c:          asm volatile("mrc p14, 0, %0, c1
, c0, 0" : "=r" (val));
./arch/arm/kernel/perf_event_xscale.c:          asm volatile("mrc p14, 0, %0, c2
, c0, 0" : "=r" (val));
./arch/arm/kernel/perf_event_xscale.c:          asm volatile("mrc p14, 0, %0, c3
, c0, 0" : "=r" (val));
./arch/arm/kernel/perf_event_xscale.c:          asm volatile("mcr p14, 0, %0, c1
, c0, 0" : : "r" (val));
./arch/arm/kernel/perf_event_xscale.c:          asm volatile("mcr p14, 0, %0, c2
, c0, 0" : : "r" (val));
./arch/arm/kernel/perf_event_xscale.c:          asm volatile("mcr p14, 0, %0, c3
, c0, 0" : : "r" (val));
./arch/arm/kernel/perf_event_xscale.c:  asm volatile("mrc p14, 0, %0, c0, c1, 0"
 : "=r" (val));
./arch/arm/kernel/perf_event_xscale.c:  asm volatile("mcr p14, 0, %0, c0, c1, 0"
 : : "r" (val));
./arch/arm/kernel/perf_event_xscale.c:  asm volatile("mrc p14, 0, %0, c5, c1, 0"
 : "=r" (val));
./arch/arm/kernel/perf_event_xscale.c:  asm volatile("mcr p14, 0, %0, c5, c1, 0"
 : : "r" (val));
./arch/arm/kernel/perf_event_xscale.c:  asm volatile("mrc p14, 0, %0, c8, c1, 0"
 : "=r" (val));
./arch/arm/kernel/perf_event_xscale.c:  asm volatile("mcr p14, 0, %0, c8, c1, 0"
 : : "r"(val));
./arch/arm/kernel/perf_event_xscale.c:  asm volatile("mrc p14, 0, %0, c4, c1, 0"
 : "=r" (val));
./arch/arm/kernel/perf_event_xscale.c:  asm volatile("mcr p14, 0, %0, c4, c1, 0"
 : : "r" (val));
./arch/arm/kernel/perf_event_xscale.c:          asm volatile("mrc p14, 0, %0, c1
, c1, 0" : "=r" (val));
./arch/arm/kernel/perf_event_xscale.c:          asm volatile("mrc p14, 0, %0, c0
, c2, 0" : "=r" (val));
./arch/arm/kernel/perf_event_xscale.c:          asm volatile("mrc p14, 0, %0, c1
, c2, 0" : "=r" (val));
./arch/arm/kernel/perf_event_xscale.c:          asm volatile("mrc p14, 0, %0, c2
, c2, 0" : "=r" (val));
./arch/arm/kernel/perf_event_xscale.c:          asm volatile("mrc p14, 0, %0, c3
, c2, 0" : "=r" (val));
./arch/arm/kernel/perf_event_xscale.c:          asm volatile("mcr p14, 0, %0, c1
, c1, 0" : : "r" (val));
./arch/arm/kernel/perf_event_xscale.c:          asm volatile("mcr p14, 0, %0, c0
, c2, 0" : : "r" (val));
./arch/arm/kernel/perf_event_xscale.c:          asm volatile("mcr p14, 0, %0, c1
, c2, 0" : : "r" (val));
./arch/arm/kernel/perf_event_xscale.c:          asm volatile("mcr p14, 0, %0, c2
, c2, 0" : : "r" (val));
./arch/arm/kernel/perf_event_xscale.c:          asm volatile("mcr p14, 0, %0, c3
, c2, 0" : : "r" (val));
./arch/arm/mach-at91/pm.h:      asm volatile(
$