sparc32: drop unused atomic24 support

atomic24 support was used to semaphores in the past - but is no longer used.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 0 insertions, 61 deletions

diff --git a/arch/sparc/lib/atomic_32.S b/arch/sparc/lib/atomic_32.S
index 178cbb8ae1b9..eb6c7359cbd1 100644
--- a/arch/sparc/lib/atomic_32.S
+++ b/arch/sparc/lib/atomic_32.S
@@ -40,60 +40,5 @@ ___xchg32_sun4md:
          mov    %g4, %o7
 #endif
 
-        /* Read asm-sparc/atomic.h carefully to understand how this works for SMP.
-         * Really, some things here for SMP are overly clever, go read the header.
-         */
-        .globl  ___atomic24_add
-___atomic24_add:
-        rd      %psr, %g3               ! Keep the code small, old way was stupid
-        nop; nop; nop;                  ! Let the bits set
-        or      %g3, PSR_PIL, %g7       ! Disable interrupts
-        wr      %g7, 0x0, %psr          ! Set %psr
-        nop; nop; nop;                  ! Let the bits set
-#ifdef CONFIG_SMP
-1:      ldstub  [%g1 + 3], %g7          ! Spin on the byte lock for SMP.
-        orcc    %g7, 0x0, %g0           ! Did we get it?
-        bne     1b                      ! Nope...
-         ld     [%g1], %g7              ! Load locked atomic24_t
-        sra     %g7, 8, %g7             ! Get signed 24-bit integer
-        add     %g7, %g2, %g2           ! Add in argument
-        sll     %g2, 8, %g7             ! Transpose back to atomic24_t
-        st      %g7, [%g1]              ! Clever: This releases the lock as well.
-#else
-        ld      [%g1], %g7              ! Load locked atomic24_t
-        add     %g7, %g2, %g2           ! Add in argument
-        st      %g2, [%g1]              ! Store it back
-#endif
-        wr      %g3, 0x0, %psr          ! Restore original PSR_PIL
-        nop; nop; nop;                  ! Let the bits set
-        jmpl    %o7, %g0                ! NOTE: not + 8, see callers in atomic.h
-         mov    %g4, %o7                ! Restore %o7
-
-        .globl  ___atomic24_sub
-___atomic24_sub:
-        rd      %psr, %g3               ! Keep the code small, old way was stupid
-        nop; nop; nop;                  ! Let the bits set
-        or      %g3, PSR_PIL, %g7       ! Disable interrupts
-        wr      %g7, 0x0, %psr          ! Set %psr
-        nop; nop; nop;                  ! Let the bits set
-#ifdef CONFIG_SMP
-1:      ldstub  [%g1 + 3], %g7          ! Spin on the byte lock for SMP.
-        orcc    %g7, 0x0, %g0           ! Did we get it?
-        bne     1b                      ! Nope...
-         ld     [%g1], %g7              ! Load locked atomic24_t
-        sra     %g7, 8, %g7             ! Get signed 24-bit integer
-        sub     %g7, %g2, %g2           ! Subtract argument
-        sll     %g2, 8, %g7             ! Transpose back to atomic24_t
-        st      %g7, [%g1]              ! Clever: This releases the lock as well
-#else
-        ld      [%g1], %g7              ! Load locked atomic24_t
-        sub     %g7, %g2, %g2           ! Subtract argument
-        st      %g2, [%g1]              ! Store it back
-#endif
-        wr      %g3, 0x0, %psr          ! Restore original PSR_PIL
-        nop; nop; nop;                  ! Let the bits set
-        jmpl    %o7, %g0                ! NOTE: not + 8, see callers in atomic.h
-         mov    %g4, %o7                ! Restore %o7
-
         .globl  __atomic_end
 __atomic_end:
diff --git a/arch/sparc/lib/ksyms.c b/arch/sparc/lib/ksyms.c
index 1b30bb3bfdb1..f73c2240fe60 100644
--- a/arch/sparc/lib/ksyms.c
+++ b/arch/sparc/lib/ksyms.c
@@ -62,8 +62,6 @@ extern void ___rw_read_enter(void);
 extern void ___rw_read_try(void);
 extern void ___rw_read_exit(void);
 extern void ___rw_write_enter(void);
-extern void ___atomic24_add(void);
-extern void ___atomic24_sub(void);
 
 /* Alias functions whose names begin with "." and export the aliases.
  * The module references will be fixed up by module_frob_arch_sections.
@@ -97,10 +95,6 @@ EXPORT_SYMBOL(___rw_read_exit);
 EXPORT_SYMBOL(___rw_write_enter);
 #endif
 
-/* Atomic operations. */
-EXPORT_SYMBOL(___atomic24_add);
-EXPORT_SYMBOL(___atomic24_sub);
-
 EXPORT_SYMBOL(__ashrdi3);
 EXPORT_SYMBOL(__ashldi3);
 EXPORT_SYMBOL(__lshrdi3);