kgdb fixes for 5.6-rc1

One of the simplifications added for 5.6-rc1 has caused build
 regressions on some platforms (it was reported for sparc64).
 This pull request fixes it with a direct revert.
 
 Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCAAdFiEELzVBU1D3lWq6cKzwfOMlXTn3iKEFAl48JNUACgkQfOMlXTn3
 iKF7cA/9G3hl4IB1D2OfbbLb6lXPu+TEWDsQk7Y5CmKgbclMv+JL684TJCU7rnFB
 Xxjho97Cj9bqR3ZGDInxLcJrAnbaD6756UC7k5jVUIcdFFhprjdgWImyJVs6VXoe
 ESahpSna+Ap3ZsMBgQJUfnBbDzY/B3jmPQ8/f7qOIjBb17AdarisClk2CdbY90Gi
 0dfJti65SLqE10on7Clx+9HmNkPp9Rs+1+4O9r2LW5c9b6aNop8iQPdLdl7/B2Me
 V9Vs5uAsLqNKBpyFuq3PG1AXzK53gK2N3wZqmOPAuKAObDM/wUqvVHaAJHqiIWN9
 U+Dn9aZCIW3Mbeat4RijVT8CCoz1WEvCQM1MUk5sbgBnQ90vwSyDmJrA88GMoHtI
 wmP5OJL/EdghGWG9+PcFH2+axD87iEq48hxVXlB9UTtvoyjLkkiXm3WvOx2UC8rX
 8tjEZvivMO3GeJBxYQUXvSFzGUeJAMZhMQm9+0qaw//SJK5GyEG0CfDDp5Ts1q2w
 +F689/TaygpOZGP5m1iFqhNAoR03g+NTX33/CYoa+Yplnn+j+LU4ZTlNq4vl1VY6
 lATR3Eu/vLYhCqdeXaZpRx4cthEFQ3kl8tT53RU2Ip20cNQkNooHPpCpkk0vSuGx
 X0PV9CX/nAFWGrfbJLCW3AQ2ZTxqdl8i2Q7HzOJUJPrddppqN/U=
 =Pb+W
 -----END PGP SIGNATURE-----

Merge tag 'kgdb-fixes-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux

Pull kgdb fix from Daniel Thompson:
 "One of the simplifications added for 5.6-rc1 has caused build
  regressions on some platforms (it was reported for sparc64).

  This fixes it with a revert"

* tag 'kgdb-fixes-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux:
  Revert "kdb: Get rid of confusing diag msg from "rd" if current task has no regs"
This commit is contained in:
Linus Torvalds 2020-02-06 09:05:42 -08:00
commit d854b2d639

View file

@ -543,8 +543,9 @@ int kdbgetaddrarg(int argc, const char **argv, int *nextarg,
if (diag) if (diag)
return diag; return diag;
} else if (symname[0] == '%') { } else if (symname[0] == '%') {
if (kdb_check_regs()) diag = kdb_check_regs();
return 0; if (diag)
return diag;
/* Implement register values with % at a later time as it is /* Implement register values with % at a later time as it is
* arch optional. * arch optional.
*/ */
@ -1835,7 +1836,8 @@ static int kdb_go(int argc, const char **argv)
*/ */
static int kdb_rd(int argc, const char **argv) static int kdb_rd(int argc, const char **argv)
{ {
int len = 0; int len = kdb_check_regs();
#if DBG_MAX_REG_NUM > 0
int i; int i;
char *rname; char *rname;
int rsize; int rsize;
@ -1844,14 +1846,8 @@ static int kdb_rd(int argc, const char **argv)
u16 reg16; u16 reg16;
u8 reg8; u8 reg8;
if (kdb_check_regs()) if (len)
return 0; return len;
/* Fallback to Linux showregs() if we don't have DBG_MAX_REG_NUM */
if (DBG_MAX_REG_NUM <= 0) {
kdb_dumpregs(kdb_current_regs);
return 0;
}
for (i = 0; i < DBG_MAX_REG_NUM; i++) { for (i = 0; i < DBG_MAX_REG_NUM; i++) {
rsize = dbg_reg_def[i].size * 2; rsize = dbg_reg_def[i].size * 2;
@ -1893,7 +1889,12 @@ static int kdb_rd(int argc, const char **argv)
} }
} }
kdb_printf("\n"); kdb_printf("\n");
#else
if (len)
return len;
kdb_dumpregs(kdb_current_regs);
#endif
return 0; return 0;
} }
@ -1927,8 +1928,9 @@ static int kdb_rm(int argc, const char **argv)
if (diag) if (diag)
return diag; return diag;
if (kdb_check_regs()) diag = kdb_check_regs();
return 0; if (diag)
return diag;
diag = KDB_BADREG; diag = KDB_BADREG;
for (i = 0; i < DBG_MAX_REG_NUM; i++) { for (i = 0; i < DBG_MAX_REG_NUM; i++) {